Boronic acid derivatives

ABSTRACT

Compounds of formula (I) are inhibitors of LMP7 and can be employed, inter alia, for the treatment of an autoimmune disorder or hematological malignancies.

FIELD OF THE INVENTION

The present invention relates to α-Amino boronic acid derivatives. These compounds are useful for inhibiting the activity of immunoproteasome (LMP7) and for the treatment and/or prevention of medical contidions affected by immunoproteasome activity such as inflammatory and autoimmune diseases, neurodegenerative diseases, hematological malignancies and proliferative diseases. In particular, the compounds of the present invention are selective imunoproteasome inhibitors.

BACKGROUND TO THE INVENTION

The proteasome (also known as macropain, the multicatalytic protease, and 20S protease) is a high molecular weight, multisubunit protease which has been identified in every examined species from an archaebacterium to human. The enzyme has a native molecular weight of approximately 650,000 and, as revealed by electron microscopy, a distinctive cylinder-shaped morphology (Rivett, (1989) Arch. Biochem. Biophys. 268:1-8; and Orlowski, (1990) Biochemistry 29:10289-10297). The proteasome subunits range in molecular weight from 20,000 to 35,000, and are homologous to one another but not to any other known protease.

The 20S proteasome is a 700 kDa cylindrical-shaped multicatalytic protease complex comprised of 28 subunits, classified as α- and β-type, that are arranged in 4 stacked heptameric rings. In yeast and other eukaryotes, 7 different a subunits form the outer rings and 7 different β subunits comprise the inner rings. The a subunits serve as binding sites for the 19S (PA700) and 1 IS (PA28) regulatory complexes, as well as a physical barrier for the inner proteolytic chamber formed by the two β subunit rings. Thus, in vivo, the proteasome is believed to exist as a 26S particle (“the 26S proteasome”). In vivo experiments have shown that inhibition of the 20S form of the proteasome can be readily correlated to inhibition of 26S proteasome.

Cleavage of amino-terminal prosequences of β subunits during particle formation expose amino-terminal threonine residues, which serve as the catalytic nucleophiles. The subunits responsible for catalytic activity in proteasome thus possess an amino terminal nucleophilic residue, and these subunits belong to the family of N-terminal nucleophile (Ntn) ATTY REF: 26500-0023WO1 hydrolases (where the nucleophilic N-terminal residue is, for example, Cys, Ser, Thr, and other nucleophilic moieties). This family includes, for example, penicillin G acylase (PGA), penicillin V acylase (PVA), glutamine PRPP amidotransferase (GAT), and bacterial glycosylasparaginase. In addition to the ubiquitously expressed β subunits, higher vertebrates also possess three interferon- γ-inducible β subunits (LMP7, LMP2 and MECLI), which replace their normal counterparts, β5, γ1 and β2, respectively. When all three IFN- γ-inducible subunits are present, the proteasome is referred to as an “immunoproteasome”. Thus, eukaryotic cells can possess two forms of proteasomes in varying ratios.

Through the use of different peptide substrates, three major proteolytic activities have been defined for the eukaryote 20S proteasomes: chymotrypsin-like activity (CT-L), which cleaves after large hydrophobic residues; trypsin-like activity (T-L), which cleaves after basic residues; and peptidylglutamyl peptide hydrolyzing activity (PGPH), which cleaves after acidic residues. Two additional less characterized activities have also been ascribed to the proteasome: BrAAP activity, which cleaves after branched-chain amino acids; and SNAAP activity, which cleaves after small neutral amino acids. Although both forms of the proteasome possess all five enzymatic activities, differences in the extent of the activities between the forms have been described based on specific substrates. For both forms of the proteasome, the major proteasome proteolytic activities appear to be contributed by different catalytic sites within the 20S core.

In eukaryotes, protein degradation is predominately mediated through the ubiquitin pathway in which proteins targeted for destruction are ligated to the 76 amino acid polypeptide ubiquitin. Once targeted, ubiquitinated proteins then serve as substrates for the 26S proteasome, which cleaves proteins into short peptides through the action of its three major proteolytic activities. While having a general function in intracellular protein turnover, proteasome-mediated degradation also plays a key role in many processes such as major histocompatibility complex (MHC) class I presentation, apoptosis and cell viability, antigen processing, NE-κB activation, and transduction of pro-inflammatory signals.

Proteasome activity is high in muscle wasting diseases that involve protein breakdown such as muscular dystrophy, cancer and AIDS. Evidence also suggests a possible role for the proteasome in the processing of antigens for the class I MHC molecules (Goldberg, et al. (1992) Nature 357:375-379).

Proteasomes are involved in neurodegenerative diseases and disorders such as Amyotrophic Lateral Sclerosis (ALS), (J Biol Chem 2003, Allen. S et al., Exp Neurol 2005, Puttaparthi k et al.), Sjogren Syndrome (Arthritis & Rheumatism, 2006, Egerer T et al.), systemic lupus erythematoses and lupus nephritis (SLE/LN), (Arthritis & rheuma 2011, Ichikawa et al., J Immunol, 2010, Lang V R et al., Nat Med, 2008, Neubert K et al), glomerulonephritis (J Am Soc nephrol 2011, Bontscho et al.), Rheumatoid Arthritis (Clin Exp Rheumatol, 2009, Van der Heiden J W et al.), Inflammatory bowel disease (IBD), ulcerative colitis, crohn's diseases, (Gut 2010, Schmidt N et al., J Immunol 2010, Basler M et al., Clin Exp Immunol, 2009, Inoue S et al.), multiple sclerosis (Eur J Immunol 2008, Fissolo Net al., J Mol Med 2003, Elliott P J et al., J Neuroimmunol 2001, Hosseini et al., J Autoimmun 2000, Vanderlugt C L et al.), Amyotrophic lateral sclerosis (ALS), (Exp Neurol 2005, Puttaparthi k et al., J Biol Chem 2003, Allen S et al.), osteoarthritis (Pain 2011, Ahmed s et al., Biomed Mater Eng 2008, Etienne S et al.), Atherosclerosis (J Cardiovasc Pharmacol 2010, Feng B et al., Psoriasis (Genes & Immunity, 2007, Kramer U et al.), Myasthenia Gravis (J Immunol, 2011, Gomez A M et al.), Dermal fibrosis (Thorax 2011, Mutlu G M et al., Inflammation 2011, Koca S S et al., Faseb J 2006, Fineschi S et al.), renal fibrosis (Nephrology 2011 Sakairi T et al.), cardiac fibrosis (Biochem Pharmacol 2011, Ma y et al.,) Liver fibrosis (Am J Physiol gastrointest Liver Physiol 2006, Anan A et al.), Lung fibrosis (Faseb J 2006, Fineschi S et al et al.), Imunoglobuline A nephropathy (IGa nephropathy), (Kidney Int, 2009, Coppo R et al.), Vasculitis (J Am Soc nephrol 2011, Bontscho et al.), Transplant rejection (Nephrol Dial transplant 2011, Waiser J et al.), Hematological malignancies (Br J Haematol 2011, singh A V et al., Curr Cancer Drug Target 2011, Chen D et al.) and asthma.

Yet, it should be noted that commercially available proteasome inhibitors inhibit both the constitutive and immuno-forms of the proteasome. Even bortezomib, the FDA-approved proteasome inhibitor for the treatment of relapsed multiple myeloma patients, does not distinguish between the two forms (Altun et al, Cancer Res 65:7896, 2005). Furthermore, the use of Bortezomib is associated with a treatment-emergent, painful peripheral neuropathy (PN), this bortezomib-induced neurodegeneration in vitro occurs via a proteasome-independent mechanism and that bortezomib inhibits several nonproteasomal targets in vitro and in vivo (Clin. Cancer Res, 17(9), May 1, 2011). In addition to conventional proteasome inhibitors, a novel approach may be to specifically target the hematological-specific immunoproteasome, thereby increasing overall effectiveness and reducing negative off-target effects. It has been shown that immunoproteasome-specific inhibitor, could display enhanced efficiency on cells from a hematologic origin (Curr Cancer Drug Targets, 11(3), Mar, 2011).

Thus there is a need to provide new proteasome inhibitors that are selective of one specific form of the proteasome. In particular there is a need to provide selective immunoproteasome inhibitors, which could be used as therapeutic agents for the treatment of e.g. SLE or other immune or autoimmune disorders in the context of rheumatoid arthritis. Selective immunoproteasome inhibitors are helpful in order to minimize unwanted side effects mediated by inhibition of the constitutive proteasome or other nonproteasomal targets.

WO 2013/092979 A1 describes boronic acid derivatives, which show some selectivety towards the inhibition of the LMP7 activity, including, inter alia, (R)-(2-(benzofuran-3-yl)-1-(2-(N-methylmethylsulfonamido) acetamido)ethyl)boronic acid. However, the extent of selectivity, which is achievable with the described types of compounds, is limited, particularly with respect to the split to the inhibitory activity of the constitutive proteasome.

Unspecific inhibitors of the proteasome and the immunoproteasome like Bortezomib and Carfilzomib have demonstrated their clinical value in the indication of multiple myeloma. Although this unspecific profile, hitting major components in the immunoproteasome as well as the constitutive proteasome, is regarded beneficial in terms of target inhibition and clinical effectiveness, this unspecific profile limits the clinical applicability of these agents by inducing pronounced side effects like thrombocytopenia, neutropenia as well as peripheral neuropathy. To a certain extent, this side effect profile could be attributed to the broad inhibition of the catalytic activity, especially the combined inhibition of the ß5 subunits of the constitutive and the immoproteasome. The approach to come up with more selective inhibitors of the immunoproteasome (and especially the ß5i subunit of the immunoproteasome), in order to reduce major side effects has been described e.g. in 2011 by Singh et al (Br. J. Hematology 152(2): 155-163) for PR-924, a 100 fold selective inhibitor of the LMP7subunit of the immuoproteasome. The authors demonstrated the presence of high expression levels of the immunoproteasome in multiple myeloma. The authors also described the effect of a selective inhibitor of the LMP7 subunit on the induction of cell death in MM cell lines as well as CD138+ MM primary patient cells without decreasing the viability of control PBMC's of healthy volunteers which can be regarded as a conceptual proof. Beside the concept of a reduced side effect profile for selective ß5i inhibitors other group demonstrated the efficacy of selective ß5i inhibition on the viability of Bortezomib resistant cell lines underlining the value and potential perspective for the application of selective LMP7inhibitors for hematological malignancies (D. Niewerth et al./Biochemical Pharmacology 89 (2014) 43-51).

Surprisingly it was found that amino boronic acid derivatives according to this invention also inhibit LMP7 and are advantageous in terms of their use in the treatment and/or prevention of medical contidions affected by immunoproteasome activity over the compounds described in WO 2013/092979 A1. In particular the compounds of the present invention are able to inhibit the activity of the immunoproteasome (LMP7) providing a significant split to the inhibitory activity of the constitutive proteasome. Beside this, the structural assembly of the compounds allows a simple and straightforward fine-tuning of the compound properties. Further important adavantages are their good results regarding plasma-protein binding, CYP inhibition, PK profile and oral bioavailabiliy.

SUMMARY OF THE INVENTION

Compounds of the present invention are inhibitors of the immunoproteasome subunit LMP7. They show significant selectivity on LMP7 over Beta5 (cP) and good properties in terms of solubility, plasma-protein binding, CYP inhibition, PK profile and oral bioavailabiliy.

The present invention provides compounds of formula (I):

wherein

-   -   LX denotes (CH₂)_(n), wherein 1 to 5 H atoms may be replaced by         Hal, R^(3a), OH, OR^(3a), C3-C6-cycloalkyl, Ar1 and/or Het1,         and/or wherein 1 or 2 non-adjacent CH₂ groups may be replaced by         C3-C6-cycloalkyl, O, SO and/or SO₂;     -   LY denotes (CH₂)_(m), wherein 1 to 5 H atoms may be replaced by         Hal, R^(3b), OH and/or OR^(3b), and/or wherein 1 or 2         non-adjacent CH₂ groups may be replaced by O, SO and/or SO₂;     -   X denotes NR^(4a)COR^(4b), CONR^(5a)R^(5b), SO₂R⁶,         SO₂NR^(7a)R^(7b), SO₂NHR⁸, SO₂R^(9a)NR^(9b)COR^(9c),         NR^(10a)SO₂R^(10b) or NHSO₂R¹¹;     -   Y denotes OR^(3c) or Cyc;     -   R¹, R² denote each, independently from one another, H or         C1-C6-alkyl, or,R¹ and R² form together a residue according to         formula (CE)

-   -   R^(3a), R^(3b), R^(3c) denote each, independently from one         another, linear or branched C1-C6-alkyl, wherein 1 to 5 H atoms         may be replaced by Hal, OH and/or OAlk;     -   R^(4a), R^(4b), R^(5a), R^(5b), R⁶, R^(7a), R^(7b), R⁸, R^(9a),         R^(9b), R^(9b), R^(10a), R^(10b) and R¹¹ denote each,         independently from one another, Ar1, Het1 or A; or R^(5a) and         R^(5b) and/or R^(7a) and R^(7b) form together a C3-C6-cycloalkyl         residue;     -   A denotes linear or branched C1-C6-alkyl or C3-C6-cycloalkyl,         each unsubstituted or mono-, di-, tri- or tetrasubstituted by         Hal, CN, R^(3a),SR^(3a),OR^(3a), Ar1, Het1, and/or (CH₂)_(q)—Z;     -   Alk denotes linear or branched C1-C6-alkyl;     -   Ar1 denotes phenyl, which is unsubstituted, mono-, bi- or         trisubstituted by Hal, NO₂, CN, R^(3a), OR^(3a), CONHR^(3a),         NR^(3a)COR^(3b), SO₂R^(3a), SOR^(3a), NH₂, NHR^(3a), N(R^(3a))₂,         Ar2, Het2 and/or (CH₂)_(q)—Z;     -   Het1 denotes saturated, unsaturated or aromatic 5- or 6-membered         heterocycle having 1 to 4 N, O and/or S atoms, wherein each         heterocycle may each be unsubstituted or mono-, di-, tri-,         tetra- or pentasubstituted by Hal, NO₂, CN, R^(3a), OR^(3a),         CONHR^(3a), NR^(3a)COR^(3b), SO₂R^(3a), SOR^(3a), NH₂, NHR^(3a),         N(R^(3a))₂, Ar2, Het2 and/or (CH₂)_(q)—Z;     -   Cyc denotes a mono- or bicyclic, 4-, 5-, 6-, 7-, 8-, 9- or         10-membered hydrocarbon or heterocycle, each independently from         one another unsubstituted or mono-, di-, tri-, tetra- or         pentasubstituted by Hal, CN, R^(3a), OR^(3a), CONHR^(3a),         CONR^(3b)R^(3a), CONH₂, NR^(3a)COR^(3b), SO₂R^(3a), SOR^(3a),         NHR^(3a), N(R^(3a))₂, Ar2, Het2 ,(CH₂)_(q)—SR^(3a),         (CH₂)_(q)—N(R^(3a))₂ and/or (CH₂)_(q)—Z, wherein the monocyclic         hydrocarbon system is aromatic and at least one ring of the         bicyclic hydrocarbon or heterocycle is aromatic, and wherein the         heterocyclic system contains 1, 2 or 3 N and/or O and/or S         atoms;     -   Ar2 denotes phenyl, biphenyl or naphthyl each indepently from         one another unsubstituted or mono- or disubstituted by Hal, CN,         R^(3a), OR^(3a), CONHR^(3a), NR^(3a)COR^(3b), SO₂R^(3a),         SOR^(3a), NH₂, NHR^(3a), N(R^(3a))₂ and/or (CH₂)_(q)—Z;     -   Het2 denotes a saturated, unsaturated or aromatic 5- or         6-membered heterocycle having 1 to 4 N, O and/or S atoms, which         is unsubstituted or mono- or disubstituted by Hal, CN, R^(3a),         OR^(3a), CONHR^(3a), NR^(3a)COR^(3b), SO₂R^(3a), SOR^(3a), NH₂,         NHR^(3a), N(R^(3a))₂ and/or (CH₂)_(q)—Z;     -   Z denotes OH, OR^(3a);     -   n,q denote each, independently from one another, 1, 2, 3, 4, 5         or 6;     -   m denotes 0, 1, 2, 3 or 4;     -   Hal denotes F, Cl, Br or I;

and derivatives, prodrugs, solvates, tautomers or stereoisomers thereof, as well as the physiologically acceptable salts of each of the foregoing, including mixtures thereof in all ratios; with the provisio that compound (R)-(2-(benzofuran-3-yl)-1-(2-(N-methylmethylsulfonamido) acetamido)ethyl)boronic acid is excluded.

(R)-(2-(benzofuran-3-yl)-1-(2-(N-methylmethylsulfonamido) acetamido)ethyl)boronic acid:

It is known that boronic acid derivatives such as compounds of formula (I), wherein R¹ and R² denote H form oligomeres. (Boronic Acids. Edited by Dennis G. Hall, Copyright® 2005 WILEY-VCH Verlag, GmbH & Co. KGaA, Weinheim, ISBN 3-527-30991-8). Such oligomeres (in particular but not limited to dimers or trimers) of compounds of formula (I) are included within this invention. Known cyclic trimers of boronic acids have for example following structure:

It is to be noted that the compounds of the present invention bear a stereogenic center at the carbon atom adjacent to the boronic acid residue; it has been denoted with an asterix (*) in formula (I)* below:

The compounds according to formula (I) thus exhibit two different configurations at this stereogenic center, i.e. the (R)-configuration and the (S)-configuration. Hence, the compounds of the present invention may be present either enantiopure or as a racemic (1:1) mixture of the two enantiomers of formula (R)-(Ia) and (S)-(Ia). This applies accordingly to the compounds according to formula (PI) as described below.

Compounds of formula (I) may also be present in a mixture in which one of the enantiomers (R)-(Ia) or (S)-(Ia) is present in an excess over the other one, e.g. 60:40, 70:30, 80:20, 90:10, 95:5 or the like. In a particular embodiment of the present invention the stereoisomer of formula (R)-(Ia) of the compound of formula (Ia) and the stereoisomer of formula (S)-(Ia) of the compound of formula (Ia) are present in a ratio of (R)-(Ia) to (S)-(Ia) of at least 90 parts of (R)-(Ia) to not more than 10 parts of (S)-(Ia), preferably of at least 95 (R)-(Ia) to not more than 5 (S)-(Ia), more preferably of at least 99 (R)-(Ia) to not more than 1 (S)-(Ia), even more preferably of at least 99.5 (R)-(Ia) to not more than 0.5 (S)-(Ia). In another particular embodiment of the present invention the stereoisomer of formula (S)-(Ia) of the compound of formula (Ia) and the stereoisomer of formula (R)-(Ia) of the compound of formula (Ia) are present in a ratio of (S)-(Ia) to (R)-(Ia) of at least 90 (S)-(Ia) to not more than 10 (R)-(Ia), preferably of at least 95 (S)-(Ia) to not more than 5 (R)-(Ia), more preferably of at least 99 (S)-(Ia) to not more than 1 (R)-(Ia), even more preferably of at least 99.5 (S)-(Ia) to not more than 0.5 (R)-(Ia). This applies accordingly to the compounds according to formula (PI) as described below.

Enriched or pure stereoisomers of formulas (R)-(Ia) and (S)-(Ia) can be obtained by usual methods known in the art and described hereinafter. A particular method for obtaining them is preparative column chromatography, such as HPLC or SFC, using chiral column material. This applies accordingly to the compounds according to formula (PI) as described below.

In a particular preferred embodiment of the present invention the stereogenic center at the carbon atom adjacent to the boronic acid residue shows an (R)-configuration (this applies accordingly to the compounds according to formula (PI) as described below.):

The compounds according to formula (I) might also carry stereogenic centers located a carbon atoms other than at the carbon atom adjacent to the boronic acid residue. Such stereogenic centers may occur in (R)- or (S)-configuration. This applies accordingly to the compounds according to formula (PI) as described below.

In general, all residues of compounds described herein which occur more than once may be identical or different, i.e. are independent of one another. Above and below, the residues and parameters have the meanings indicated for formula (I), unless expressly indicated otherwise. Accordingly, the invention relates, in particular, to the compounds of formula (I) in which at least one of the said residues has one of the preferred meanings indicated below. Furthermore, all specific embodiments described below shall include derivatives, prodrugs, solvates, tautomers or stereoisomers thereof as well as the physiologically acceptable salts of each of the foregoing, including mixtures thereof in all ratios.

In case Cyc denotes a bicyclic hydrocarbon or heterocycle, wherein at least one of the two rings of is an aromatic ring, the other ring may be a saturated, unsaturated or aromatic ring. In specific embodiments the covalent linkage between Cyc and the adjacent group LY occurs via the at least one aromatic ring of Cyc. The bicyclic hydrocarbon or heterocycle is preferably 8-, 9- or 10-membered. In case Cyc is a monocyclic heterocyle if preferably contains 1, 2 or 3 heteroatoms selected from N, O and/or S, most preferably it contains 1 or 2 heteroatoms. In case Cyc is a bicyclic heterocyle if preferably contains 1, 2, 3 or 4 heteroatoms selected from N, O and/or S, most preferably it contains 1, 2 or 3 heteroatoms.

In case Cyc denotes a monocyclic, aromatic hydrocarbon system it is preferably phenyl, which is unsubstituted or mono-, di- or trisubstituted by Hal, CN, R^(3a), OR^(3a), CONHR^(3a), NR^(3a)COR^(3b), SO₂R^(3a), SOR^(3a), NHR^(3a), N(R^(3a))₂, Ar2, Het2 and/or (CH₂)_(q)—Z. Particular preferred are embodiments wherein Cyc denotes a di- or trisubstituted phenyl. In those embodiments were Cyc denotes a disubstituted phenyl, the two substituents are preferably in 2,4- or 3,4-position. And in those embodiments were Cyc denotes a trisubstituted phenyl, the three substituents are preferably in 2,3,4-position of the aromatic ring.

In case Cyc denotes a monocyclic heterocycle this heterocycle can be saturated, unsaturated or aromatic.

One specific embodiment of the present invention comprises compounds of formula (I) wherein

-   -   LX denotes (CH₂)_(n), wherein 1 to 5 H atoms may be replaced by         Hal, R^(3a), OH, OR^(3a), Ar1 and/or Het1 , and/or wherein 1 or         2 non-adjacent CH₂ groups may be replaced by O, SO and/or SO₂;     -   LY denotes (CH₂)_(m), wherein 1 to 5 H atoms may be replaced by         Hal, R^(3b), OH and/or OR^(3b), and/or wherein 1 or 2         non-adjacent CH₂ groups may be replaced by O, SO and/or SO₂;     -   X denotes NR^(4a)COR^(4b), CONR^(5a)R^(5b), SO₂R⁶,         SO₂NR^(7a)R^(7b), SO₂NHR⁸, SO₂R^(9a)NR^(9b)COR^(9c),         NR^(10a)SO₂R^(10b) or NHSO₂R¹¹;     -   Y denotes OR^(3c) or Cyc;     -   R¹, R² denote each, independently from one another, H or         C1-C6-alkyl, or R¹ and R² form together a residue according to         formula (CE)

-   -   R^(3a,) R^(3b), R^(3c) denote each, independently from one         another, linear or branched C1-C6-alkyl, wherein 1 to 5 H atoms         may be replaced by Hal, OH and/or OAlk;     -   R^(4a), R^(4b), R^(5a), R^(5b), R⁶, R^(7a), R^(7b), R⁸, R^(9a),         R^(9b), R^(9c), R^(10a), R^(10b) and R¹¹ denote each,         independently from one another, Ar1, Het1 or A;     -   A denotes linear or branched C1-C6-alkyl or C3-C6-cycloalkyl,         each unsubstituted or mono-, di-, tri- or tetrasubstituted by         Hal, CN, R^(3a), OR^(3a), An, Het1, and/or (CH₂)_(q)—Z;     -   Alk denotes linear or branched C1-C6-alkyl;     -   Ar1 denotes phenyl, which is unsubstituted, mono-, bi- or         trisubstituted by Hal, NO₂, CN, R^(3a), OR^(3a), CONHR^(3a),         NR^(3a)COR^(3b), SO₂R^(3a), SOR^(3a), NH₂, NHR^(3a), N(R^(3a))₂,         Ar2, Het2 and/or (CH₂)_(q)—Z;     -   Het1 denotes saturated, unsaturated or aromatic 5- or 6-membered         heterocycle having 1 to 4 N, O and/or S atoms, wherein each         heterocycle may each be unsubstituted or mono-, di-, tri-,         tetra- or pentasubstituted by Hal, NO₂, CN, R^(3a), OR^(3a),         CONHR^(3a), NR^(3a)COR^(3b), SO₂R^(3a), SOR^(3a), NH₂, NHR^(3a),         N(R^(3a))₂, Ar2, Het2 and/or (CH₂)_(q)—Z;     -   Cyc denotes a mono- or bicyclic, 4-, 5-, 6-, 7-, 8-, 9- or         10-membered hydrocarbon or heterocycle, each independently from         one another unsubstituted or mono-, di-, tri-, tetra- or         pentasubstituted by Hal, CN, R^(3a), OR^(3a), CONHR^(3a),         NR^(3a)COR^(3b), SO₂R^(3a), SOR^(3a), NH₂, NHR^(3a), N(R^(3a))₂,         Ar2, Het2 and/or (CH₂)_(q)—Z, wherein the monocyclic hydrocarbon         system is aromatic and at least one ring of the bicyclic         hydrocarbon or heterocycle is aromatic, and wherein the         heterocyclic system contains 1, 2 or 3 N and/or O and/or S         atoms;     -   Ar2 denotes phenyl, biphenyl or naphthyl each indepently from         one another unsubstituted or mono- or disubstituted by Hal, CN,         R^(3a), OR^(3a), CONHR^(3a), NR^(3a)COR^(3b), SO₂R^(3a),         SOR^(3a), NH₂, NHR^(3a), N(R^(3a))₂ and/or (CH₂)_(q)—Z;     -   Het2 denotes a saturated, unsaturated or aromatic 5- or         6-membered heterocycle having 1 to 4 N, O and/or S atoms, which         is unsubstituted or mono- or disubstituted by Hal, CN, R^(3a),         OR^(3a), CONHR^(3a), NR^(3a)COR^(3b), SO₂R^(3a), SOR^(3a), NH₂,         NHR^(3a), N(R^(3a))₂ and/or (CH₂)_(q)—Z;     -   Z denotes OH, OR³a;     -   n,q denote each, independently from one another, 1, 2, 3, 4, 5         or 6;     -   m denotes 0, 1, 2, 3 or 4;     -   Hal denotes F, Cl, Br or I;

and derivatives, prodrugs, solvates, tautomers or stereoisomers thereof, as well as the physiologically acceptable salts of each of the foregoing, including mixtures thereof in all ratios; with the provisio that compound (R)-(2-(benzofuran-3-yl)-1-(2-(N-methylmethylsulfonamido) acetamido)ethyl)boronic acid is excluded.

One further specific embodiment of the present invention comprises compounds of formula (I) wherein Y denotes Cyc and derivatives, prodrugs, solvates, tautomers or stereoisomers thereof, as well as the physiologically acceptable salts of each of the foregoing, including mixtures thereof in all ratios, wherein Cyc has the meaning as described above.

In such embodiments Cyc may for example denote phenyl, 1- or 2-naphthyl, 4- or 5-indanyl, 1-, 2-, 4-, 5- or 6-azulenyl, 1- or 2-tetrahydronaphthalin 5- or 6-yl, 2- or 3-furyl, 2-, 3-, 4-, 5-, 6- or 7-benzofuryl, 2-, 3-, 4-, 5-, 6- or 7-benzothiophenyl, benzodioxan-6- or 7-yl or 3,4-dihydro-1,5-benzodioxepin-6- or -7-yl, each independently from one another unsubstituted or mono-, di-, tri-, tetra- or pentasubstituted by Hal, CN, R^(3a), OR^(3a), CONHR^(3a), NR^(3a)COR^(3b), SO₂R^(3a), SOR^(3a), NHR^(3a), N(R^(3a))₂, Ar1, Het 1 and/or (CH₂)_(q)—Z; and derivatives, prodrugs, solvates, tautomers or stereoisomers thereof, as well as the physiologically acceptable salts of each of the foregoing, including mixtures thereof in all ratios. In specific examples of such embodiments Cyc is unsubstituted or mono-, di- or trisubstituted. Additionally, in case Cyc is substituted the substituents are preferably selected from a group comprising Hal, R^(3a), OR^(3a), Ar1, Het1 Thus,substituents of Cyc may e.g. be selected from a group consisting of F, Cl, Br, OCH₃, OC₂H₅, CH₂OCH₃, CH₃, C₂H₅, CF₃, OCF₃, phenyl, biphenyl, naphtyl, furyl, thienyl, pyrrolyl, imidazolyl, morpholinyl, piperazinyl, benzofuryl, benzodioxolyl and/or pyridyl or even more preferably selected from from a group comprising F, Cl, Br, OCH₃, CH₂OCH₃, CH₃, C₂H₅, CF₃, OCF₃ and/or phenyl.

In other embodiments Cyc denotes phenyl, which is unsubstituted, mono-, di- or trisubstituted by Hal, CN, R^(3a), OR^(3a), CONHR^(3a), CONR^(3b)R^(3a), CONH₂, NR^(3a)COR^(3b), SO₂R^(3a), SOR^(3a), NHR^(3a), N(R^(3a))₂, Ar2, Het2, (CH₂)_(q)—SR^(3a), (CH₂)_(q)—N(R^(3a))₂ and/or (CH₂)_(q)—Z;

or

1- or 2-naphthyl, 4- or 5-indanyl, 1-, 2-, 4-, 5- or 6-azulenyl, 1- or 2-tetrahydronaphthalin 5- or 6-yl, 2- or 3-furyl, 2- or 3-thienyl, 2-, 3-, 4-, 5-, 6- or 7-benzofuryl, 2,3-dihydrobenzofuran-2- or 3-yl, 2-, 3-, 4-, 5-, 6- or 7-benzothiophenyl, benzodioxan-6- or 7-yl or 3,4-dihydro-1,5-benzodioxepin-6- or -7-yl, each, independently from one another, unsubstituted or mono-, di- or trisubstituted by Hal, CN, R^(3a), OR^(3a), CONHR^(3a), CONR^(3b)R^(3a), CONH₂, NR^(3a)COR^(3b), SO₂R^(3a), SOR^(3a), NHR^(3a), N(R^(3a))₂, Ar2, Het2 ,(CH₂)_(q)—SR^(3a), (CH₂)_(q)—N(R^(3a))₂ and/or (CH₂)_(q)—Z;

and derivatives, prodrugs, solvates, tautomers or stereoisomers thereof, as well as the physiologically acceptable salts of each of the foregoing, including mixtures thereof in all ratios; with the provisio that compound (R)-(2-(benzofuran-3-yl)-1-(2-(N-methylmethylsulfonamido) acetamido)ethyl)boronic acid is excluded. Additionally, in case Cyc is substituted the substituents are preferably selected from a group comprising Hal, R^(3a), OR^(3a), Ar2, Het2. Thus, substituents of Cyc may e.g. be selected from a group consisting of F, Cl, Br, OCH₃, OC₂H₅, CH₂OCH₃, CH₃, C₂H₅, CF₃, OCF₃, phenyl, biphenyl, naphtyl, furyl, thienyl, pyrrolyl, imidazolyl, morpholinyl, piperazinyl, benzofuryl, benzodioxolyl and/or pyridyl or even more preferably selected from from a group comprising F, Cl, Br, OCH₃, CH₂OCH₃, CH₃, C₂H₅, CF₃, OCF_(3,) and/or phenyl.

Another specific embodiment of of the present invention comprises compounds of formula (I) wherein:

R¹, R² denote H, C1-C4-alkyl (preferably methyl or ethyl) or R¹ and R² form together a residue according to formula (CE)

and

A denotes linear or branched C1-C6-alkyl, each unsubstituted or mono-, di-, tri- or tetrasubstituted by Hal, CN, R^(3a), SR^(3a), OR^(3a), Ar1, Het1, and/or (CH₂)_(q)—Z;

n,q denote each, independently from one another, 1, 2, 3 or 4; and

m denotes 1 or 2;

and derivatives, prodrugs, solvates, tautomers or stereoisomers thereof, as well as the physiologically acceptable salts of each of the foregoing, including mixtures thereof in all ratios; with the provisio that compound (R)-(2-(benzofuran-3-yl)-1-(2-(N-methylmethylsulfonamido) acetamido)ethyl)boronic acid is excluded.

Another particular embodiment of the present invention comprises compounds of formula (I) wherein:

R¹, R² denote H, C1-C4-alkyl (preferably methyl or ethyl) or R¹ and R² form together a residue according to formula (CE)

and

A denotes linear or branched C1-C6-alkyl, each unsubstituted or mono-, di-, tri- or tetrasubstituted by Hal, CN, R^(3a), OR^(3a), Ar1, Het1, and/or (CH₂)_(q)—Z;

n,q denote each, independently from one another, 1, 2, 3 or 4; and

m denotes 1 or 2;

and derivatives, prodrugs, solvates, tautomers or stereoisomers thereof, as well as the physiologically acceptable salts of each of the foregoing, including mixtures thereof in all ratios; with the provisio that compound (R)-(2-(benzofuran-3-yl)-1-(2-(N-methylmethylsulfonamido) acetamido)ethyl)boronic acid is excluded.

A partiuclar embodiment comprises compounds according to formula (I), wherein Cyc denotes 3-, 4-, 2,4-, 3,4-, or 2,3,4-substituted phenyl, wherein the subsitutents are selected from a group consisting of Hal, CN, R^(3a), OR^(3a), CONHR^(3a), CONR^(3b)R^(3a), CONH₂, NR^(3a)COR^(3b), SO₂R^(3a), SOR^(3a), NHR^(3a), N(R^(3a))₂, (CH₂)_(q)—SR^(3a), (CH₂)_(q)—N(R^(3a))₂ and/or (CH₂)_(q)—Z;

or

1- or 2-naphthyl, 2- or 3-thienyl, 3-benzofuryl or 2,3-dihydrobenzofuran-3-yl, each independently from one another unsubstituted or mono-, di- or trisubstituted by Hal, CN, R^(3a), OR^(3a), CONHR^(3a), CONR^(3b)R^(3a), CONH₂, NR^(3a)COR^(3b), SO₂R^(3a), SOR^(3a), NHR^(3a), N(R^(3a))₂, (CH₂)_(q)—SR^(3a), (CH₂)_(q)—N(R^(3a))₂ and/or (CH₂)_(q)—Z; and derivatives, prodrugs, solvates, tautomers or stereoisomers thereof, as well as the physiologically acceptable salts of each of the foregoing, including mixtures thereof in all ratios; with the provisio that compound (R)-(2-(benzofuran-3-yl)-1-(2-(N-methylmethylsulfonamido) acetamido)ethyl)boronic acid is excluded. In those embodiments were Cyc is a disubstituted Cyc is a 3-benzofuryl residue, the two substituents are preferably in 7,6- or 7,4-position benzofuranyl system. And in those embodiments were Cyc denotes is a disubstituted 2,3-dihydrobenzofuran-3-yl residue (((3R)-2,3-dihydrobenzofuran-3-yl or (3S)-2,3-dihydrobenzofuran-3-yl)), the three substituents are preferably in 7,6- or 7,4-position of the dihydrobenzofuranyl system. In those embodiments were Cyc is a monosubstituted Cyc is a 3-benzofuryl residue, the substituent is preferably in 7-position of the benzofuranyl system. And in those embodiments were Cyc denotes a disubstituted 2,3-dihydrobenzofuran-3-yl residue ((3R)-2,3-dihydrobenzofuran-3-yl or (3S)-2,3-dihydrobenzofuran-3-yl), the substituent is preferably in 7-position of the dihydrobenzofuranyl system. Further specific embodiments comprise compounds wherein Cyc is an unsubstituted 2,3-dihydrobenzofuran-3-yl residue and/or an 7-substitued 3-benzofuryl residue.

Other specific embodiments of the present invention comprise compounds, wherein Cyc denotes 2,4-, 3,4-, or 2,3,4-substituted phenyl, wherein the subsitutents are selected from a group consisting of Hal, CN, R^(3a), OR^(3a), CONHR^(3a), CONR^(3b)R^(3a), CONH₂, NR^(3a)COR^(3b), SO₂R^(3a), SOR^(3a), NHR^(3a), N(R^(3a))₂, (CH₂)_(q)—SR^(3a), (CH₂)_(q)—N(R^(3a))_(2 and/or) (CH₂)_(q)—Z;

or

Cyc denotes 1- or 2-naphthyl, 3-benzofuryl or 2,3-dihydrobenzofuran-3-yl, each independently from one another unsubstituted or mono-, di- or trisubstituted by Hal, CN, R^(3a), OR^(3a), CONHR^(3a), CONR^(3b)R^(3a), CONH₂, NR^(3a)COR^(3b), SO₂R^(3a), SOR^(3a), NHR^(3a), N(R^(3a))₂, (CH₂)_(q)—SR^(3a), (CH₂)_(q)—N(R^(3a))₂ and/or (CH₂)_(q)—Z; and wherein q denotes 1 or 2, and R^(3a), R^(3b) and R^(3c) denote each, independently from one another, linear or branched C1-C3-alkyl, wherein 1 to 5 H atoms may be replaced by F, Cl, OH and OAlk, wherein Alk is methyl or ethyl. In such embodiments the substituents are preferably selected from a group comprising F, Cl, Br, CH₃, C₂H₅, CF₃, OCH₃, OC₂H₅, COCF₃, SCH₃, SC₂H₅, N(CH₃)₂, CH₂N(CH₃)₂ and/or N(C₂H₅)₂. Furthermore, in those embodiments were Cyc is a disubstituted Cyc is a 3-benzofuryl residue, the two substituents are preferably in 7,6- or 7,4-position benzofuranyl system. And in those embodiments were Cyc denotes is a disubstituted 2,3-dihydrobenzofuran-3-yl residue (((3R)-2,3-dihydrobenzofuran-3-yl or (3S)-2,3-dihydrobenzofuran-3-yl)), the three substituents are preferably in 7,6- or 7,4-position of the dihydrobenzofuranyl system. In those embodiments were Cyc is a monosubstituted Cyc is a 3-benzofuryl residue, the substituent is preferably in 7-position of the benzofuranyl system. And in those embodiments were Cyc denotes a disubstituted 2,3-dihydrobenzofuran-3-yl residue ((3R)-2,3-dihydrobenzofuran-3-yl or (3S)-2,3-dihydrobenzofuran-3-yl), the substituent is preferably in 7-position of the dihydrobenzofuranyl system. Further specific embodiments comprise compounds wherein Cyc is an unsubstituted 2,3-dihydrobenzofuran-3-yl residue and/or an 7-substitued 3-benzofuryl residue.

Particular embodiments of the invention comprise compounds wherein Cyc denotes 2,4-, 3,4-, or 2,3,4-substituted phenyl or unsubstituted or mono- or disubstituted 1- or 2-naphthyl, wherein the subsitutents are each, independently from one another, selected from a group consisting of Hal, CN, R^(3a), OR^(3a), CONHR^(3a), CONR^(3b)R^(3a), CONH₂, NR^(3a)COR^(3b), SO₂R^(3a), SOR^(3a), NHR^(3a), N(R^(3a))₂, (CH₂)_(q)—SR^(3a), (CH₂)_(q)—N(R^(3a))₂ and/or (CH₂)_(q)—Z;

or

Cyc is a residue according to formula (Fa7) or (Fb7)

wherein,

G^(a) denotes, F, Cl, Br, CN, R^(3a), OR^(3a), CONHR^(3a), CONR^(3b)R^(3a), CONH₂, NR^(3a)COR^(3b), SO₂R^(3a), SOR^(3a), NHR^(3a), N(R^(3a))₂, (CH₂)_(q)—SR^(3a), (CH₂)_(q)—N(R^(3a))₂ and/or (CH₂)_(q)—Z;

G^(b) denotes H, F, Cl, Br, CN, R^(3a), OR^(3a), CONHR^(3a), CONR^(3b)R^(3a), CONH₂, NR^(3a)COR^(3b), SO₂R^(3a), SOR^(3a), NHR^(3a), N(R^(3a))₂, (CH₂)_(q)—SR^(3a), (CH₂)_(q)—N(R^(3a))₂and/or (CH₂)_(q)—Z;

K^(a), K^(b) denote each, independently from one another, H, F, Cl, Br, CN, R^(1a), OR^(3a), CONHR^(3a), CONR^(3b)R^(3a), CONH₂, NR^(3a)COR^(3b), SO₂R^(3a), SOR^(3a), NHR^(3a), N(R^(3a))₂, (CH₂)_(q)—SR^(3a), (CH₂)_(q)—N(R^(3a))₂ and/or (CH₂)_(q)—Z;

R^(3a), R^(3b) and R^(3c) denote each, independently from one another, linear or branched C1-C3-alkyl, wherein 1 to 5 H atoms may be replaced by F, Cl, OH and OAlk, wherein Alk is methyl or ethyl;

q denotes 1 or 2

and derivatives, prodrugs, solvates, tautomers or stereoisomers thereof, as well as the physiologically acceptable salts of each of the foregoing, including mixtures thereof in all ratios. Particular embodiments comprise compounds wherein Cyc is an unsubstituted 2,3-dihydrobenzofuran-3-yl residue ((Fb7)), wherein G^(b) and K^(b) denote H) and/or an 7-substitued 3-benzofuryl residue ((Fa7), wherein K^(a) is H).

The residues according to formula (Fb) bear a stereogenic center at the carbon atom next to LY; it has been denoted with an asterix (*) in formula (Fb)* below:

The residues according to formula (Fb) thus exhibit two different configurations at this stereogenic center, i.e. the (R)-configuration and the (S)-configuration. Hence, the compounds of the present invention may be present either enantiopure or as a racemic (1:1) mixture of the two enantiomers of formula (R)-(Fb) and (S)-(Fb).

Compounds of formula (I) which include residues according to formula (Fb) may also be present in a mixture in which one of the enantiomers (R)-(Fb) or (S)-(Fb) is present in an excess over the other one, e.g. 60:40, 70:30, 80:20, 90:10, 95:5 or the like. In a particular embodiment of the present invention the stereoisomer of formula (R)-(Fb) of the compound of formula (Ia) and the stereoisomer of formula (S)-(Fb) of the compound of formula (Ia) are present in a ratio of (R)-(Fb) to (S)-(Fb) of at least 90 parts of (R)-(Fb) to not more than 10 parts of (S)-(Fb), preferably of at least 95 (R)-(Fb) to not more than 5 (S)-(Fb), more preferably of at least 99 (R)-(Fb) to not more than 1 (S)-(Fb), even more preferably of at least 99.5 (R)-(Fb) to not more than 0.5 (S)-(Fb). In another particular embodiment of the present invention the stereoisomer of formula (S)-(Fb) of the compound of formula (Fb) and the stereoisomer of formula (R)-(Fb) of the compound of formula (I) are present in a ratio of (S)-(Fb) to (R)-(Fb) of at least 90 (S)-(Fb) to not more than 10 (R)-(Fb), preferably of at least 95 (S)-(Fb) to not more than 5 (R)-(Fb), more preferably of at least 99 (S)-(Fb) to not more than 1 (R)-(Fb), even more preferably of at least 99.5 (S)-(Fb) to not more than 0.5 (R)-(Fb).

In a preferred embodiment of the present inventionthe stereogenic center at the carbon atom in position 3 of the dihydrofuranyl residue shows an (S)-configuration. Thus, the residue is a (3S)-2,3-dihydrobenzofuran-3-yl residue (S)-(Fb):

Accordingly, another very important embodiment of the invention the present invention comprises compounds according to formula (I), which include a residue according to formula (Fb), wherein the stereogenic center at the carbon atom in position 3 of the dihydrofuranyl residue shows an (S)-configuration and the stereogenic center at the carbon atom adjacent to the boronic acid residue shows an (R)-configuration:

In a particular embodiment of the present invention Cyc denotes 2,4-, 3,4-, or 2,3,4-substituted phenyl or unsubstituted or mono- or disubstituted 1- or 2-naphthyl, wherein the subsitutents are each, independently from one another, selected from a group consisting of Hal, CN, R^(3a), OR^(3a), CONHR^(3a), CONR^(3b)R^(3a), CONH₂, NR^(3a)COR^(3b), SO₂R^(3a), SOR^(3a), NHR^(3a), N(R^(3a))₂, (CH₂)_(q)—SR^(3a), (CH₂)_(q)—N(R^(3a))₂ and/or (CH₂)_(q)—Z;

or

Cyc is a residue according to formula (Fa7) or (S)-(Fb7)

wherein,

G^(a) denotes F, Cl, Br, CN, R^(3a), OR^(3a), CONHR^(3a), CONR^(3b)R^(3a), CONH₂, NR^(3a)COR^(3b), SO₂R^(3a), SOR^(3a), NHR^(3a), N(R^(3a))₂, (CH₂)_(q)—SR^(3a), (CH₂)_(q)—N(R^(3a))₂ and/or (CH₂)_(q)—Z;

G^(b) denotes H, F, Cl, Br, CN, R^(3a), OR^(3a), CONHR^(3a), CONR^(3b)R^(3a), CONH₂, NR^(3a)COR^(3b), SO₂R^(3a), SOR^(3a), NHR^(3a), N(R^(3a))₂, (CH₂)_(q)—SR^(3a), (CH₂)_(q)—N(R^(3a))₂ and/or (CH₂)_(q)—Z;

K^(a), K^(b) denote each, independently from one another, H, F, Cl, Br, CN, R^(3a), OR^(3a), CONHR^(3a), CONR^(3b)R^(3a), CONH₂, NR^(3a)COR^(3b), SO₂R^(3a), SOR^(3a), NHR^(3a), N(R^(3a))₂, (CH₂)_(q)—SR^(3a), (CH₂)_(q)—N(R^(3a))₂and/or (CH₂)_(q)—Z;

R^(3a), R^(3b) and R^(3c) denote each, independently from one another, linear or branched C1-C3-alkyl, wherein 1 to 5 H atoms may be replaced by F, Cl, OH and OAlk, wherein Alk is methyl or ethyl;

q denotes 1 or 2

and derivatives, prodrugs, solvates, tautomers or stereoisomers thereof, as well as the physiologically acceptable salts of each of the foregoing, including mixtures thereof in all ratios. In further specific embodiments G^(b) and K^(b) denote each H.

Further particular embodiment of the present invention wherein;

Cyc denotes 2,4-, 3,4-, or 2,3,4-substituted phenyl or unsubstituted or mono- or disubstituted 1- or 2-naphthyl, wherein the subsitutents are each, independently from one another, selected from a group consisting of F, Cl, CH₃, C₂H₅, CF₃, OCH₃, OC₂H₅, COCF₃, SCH₃, SC₂H₅, CH₂OCH₃, N(CH₃)₂, CH₂N(CH₃)₂ or N(C₂H₅)₂;

or

Cyc is a residue according to formula (Fa7), (Fb7) or (S)-(Fb7) as defined above comprise compounds, wherein:

G^(a) denotes F, Cl, CH₃, C₂H₅, CF₃, OCH₃, OC₂H₅, COCF₃, SCH₃, SC₂H₅, CH₂OCH₃, N(CH₃)₂, CH₂N(CH₃)₂ or N(C₂H₅)₂;

G^(b) denotes H, F, Cl, CH₃, C₂H₅, CF₃, OCH₃, OC₂H₅, COCF₃, SCH₃, SC₂H₅, CH₂OCH₃, N(CH₃)₂, CH₂N(CH₃)₂ or N(C₂H₅)₂;

K^(a), K^(b) denote each, independently from one another, H, F, Cl, CH₃, C₂H₅, CF₃, OCH₃, OC₂H₅, COCF₃, SCH₃, SC₂H₅, CH₂OCH₃, N(CH₃)₂, CH₂N(CH₃)₂ or N(C₂H₅)₂; in very particular embodiments K^(a) and K^(b) denote H;

and derivatives, prodrugs, solvates, tautomers or stereoisomers thereof, as well as the physiologically acceptable salts of each of the foregoing, including mixtures thereof in all ratios.

Another specific embodiment of the present invention comprises compounds of formula (I) wherein the stereogenic center at the carbon atom adjacent to the boronic acid residue shows an (R)-configuration

-   -   LX denotes-CH₂—, —CH₂—CH₂—, —CH₂—CH₂—CH₂—, —CH₂—CH₂—CH₂—CH₂—,         —CH₂—CH₂—O—CH₂— wherein 1 to 4 H atoms may be replaced by F or         Cl and/or 1 or 2 H atoms may be replaced by OH, methy, ethyl,         isopropyl, CF₃, CF₂CF₃, OCH₃, OCH₂CH₃, O—CH₂—CH₂—OH,         O—CH₂—CH₂—OCH₃, phenyl, tolyl, ethylphenyl, fluorophenyl,         chlorophenyl, bromophenyl, aminophenyl, furyl, thienyl,         pyrrolyl, imidazolyl, pyrazolyl, pyrimidyl, morpholinyl and/or         piperidinyl; and     -   LY denotes —CH₂— or —CH₂—CH₂— wherein 1 to 4 H atom may be         replaced by F or Cl and/or 1 or 2 H atoms may be replaced by OH,         methy, ethyl, isopropyl, CF₃, CF₂CF₃, OCH₃, OCH₂CH₃,         O—CH₂—CH₂—OH, O—CH₂—CH₂—OCH₃; and     -   Y denotes Cyc; and     -   R¹, R² denote each, independently from one another H,         C1-C4-alkyl (preferably methyl or ethyl), or R¹ and R² form         together a residue according to formula (CE) as described above;         and     -   R^(3a), R^(3b) and R^(3c) denote each, independently from one         another, linear or branched C1-C3-alkyl, wherein 1 to 5 H atoms         may be replaced by F, Cl, OH and OAlk, wherein Alk is methyl or         ethyl; and     -   A denotes ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl         or tert-butyl, furthermore also pentyl, 1-, 2- or 3-methylbutyl,         1,1-, 1,2- or 2,2-dimethylpropyl, 1-ethylpropyl, hexyl, 1-, 2-,         3- or 4-methylpentyl, 1,1-, 1,2-, 1,3-, 2,2-, 2,3- or         3,3-dimethylbutyl, 1- or 2-ethylbutyl, 1-ethyl-1-methylpropyl or         1-ethyl-2-methylpropyl, each unsubstituted or mono-, di-, tri-         or tetrasubstituted by Hal, CN, R^(3a), SR^(3a), OR^(3a), Ar1,         Het1, and/or (CH₂)_(q)—Z; and     -   Ar1 denotes phenyl, o-, m- or p-tolyl, o-, m- or p-ethylphenyl,         o-, m- or p-propylphenyl, o-, m- or p-isopropylphenyl, o-, m- or         p-tert-butylphenyl, o-, m- or p-hydroxyphenyl, o-, m- or         p-nitrophenyl, o-, m- or p-aminophenyl, o-, m- or         p-(N-methylamino)phenyl, o-, m- or         p-(N-methylaminocarbonyl)phenyl, o-, m- or p-acetamidophenyl,         o-, m- or p-methoxyphenyl, o-, m- or p-ethoxyphenyl, o-, m- or         p-(N,N-dimethylamino)phenyl, o-, m- or p-(N-ethylamino)phenyl,         o-, m- or p-(N,N-diethylamino)phenyl, o-, m- or p-fluorophenyl,         o-, m- or p-bromophenyl, o-, m- or p-chlorophenyl, o-, m- or         p-(methylsulfonyl)phenyl, o-, m- or p-methylsulfanylphenyl, o-,         m- or p-cyanophenyl, o-, m- or p-(3-oxomorpholin-4-yl)phenyl,         o-, m- or p-(piperidinyl)phenyl, o-, m- or         p-(morpholin-4-yl)phenyl, furthermore preferably 2,3-, 2,4-,         2,5-, 2,6-, 3,4- or 3,5-dimethylphenyl, 2,3-, 2,4-, 2,5-, 2,6-,         3,4- or 3,5-difluorophenyl, 2,3-, 2,4-, 2,5-, 2,6-, 3,4- or         3,5-dichlorophenyl, 2,3-, 2,4-, 2,5-, 2,6-, 3,4- or         3,5-dibromophenyl, 2,4- or 2,5-dinitrophenyl, 2,5- or         3,4-dimethoxyphenyl, 3-nitro-4-chlorophenyl, 3-amino-4-chloro-,         2-amino-3-chloro-, 2-amino-4-chloro-, 2-amino-5-chloro- or         2-amino-6-chlorophenyl, 2-nitro-4-N,N-dimethylamino- or         3-nitro-4-N,N-dimethylaminophenyl, 2,3-diaminophenyl, 2,3,4-,         2,3,5-, 2,3,6-, 2,4,6- or 3,4,5-trichlorophenyl,         2,4,6-trimethoxyphenyl, 2-hydroxy-3,5-dichlorophenyl,         p-iodophenyl, 3,6-dichloro-4-aminophenyl,         4-fluoro-3-chlorophenyl, 2-fluoro-4-bromophenyl,         2,5-difluoro-4-bromophenyl, 3-bromo-6-methoxyphenyl,         3-chloro-6-methoxyphenyl, 3-chloro-4-acetamidophenyl,         3-fluoro-4-methoxyphenyl, 3-amino-6-methylphenyl,         3-chloro-4-acetamidophenyl or 2,5-dimethyl-4-chloropheny; and     -   Het1 denotes 2- or 3-furyl, 2- or 3-thienyl, 1-, 2- or         3-pyrrolyl, 1-, 2-, 4- or 5-imidazolyl, 1-, 3-, 4- or         5-pyrazolyl, 2-, 4- or 5-oxazolyl, 3-, 4- or 5-isoxazolyl, 2-,         4- or 5-thiazolyl, 3-, 4- or 5-isothiazolyl, 2-, 3- or         4-pyridyl, 2-, 4-, 5- or 6-pyrimidinyl, furthermore preferably         1,2,3-triazol-1-, -4- or -5-yl, 1,2,4-triazol-1-, -3- or -5-yl,         1- or 5-tetrazolyl, 1,2,3-oxadiazol-4- or -5-yl,         1,2,4-oxadiazol-3- or -5-yl, 1,3,4-thiadiazol-2- or -5-yl,         1,2,4-thiadiazol-3- or -5-yl, 1,2,3-thiadiazol-4- or -5-yl, 3-         or 4-pyridazinyl or pyrazinyl, 2,3-dihydro-2-, -3-, -4- or         -5-furyl, 2,5-dihydro-2-, -3-, -4- or -5-furyl, tetrahydro-2- or         -3-furyl, 1,3-dioxolan-4-yl, tetrahydro-2- or -3-thienyl,         2,3-dihydro-1-, -2-, -3-, -4- or -5-pyrrolyl, 2,5-dihydro-1-,         -2-, -3-, -4- or -5-pyrrolyl, 1-, 2- or 3-pyrrolidinyl,         tetrahydro-1-, -2- or -4-imidazolyl, 2,3-dihydro-1-, -2-, -3-,         -4- or -5-pyrazolyl, tetrahydro-1-, -3- or -4-pyrazolyl,         1,4-dihydro-1-, -2-, -3- or -4-pyridyl, 1,2,3,4-tetrahydro-1-,         -2-, -3-, -4-, -5- or -6-pyridyl, 1-, 2-, 3- or 4-piperidinyl,         2-, 3- or 4-morpholinyl, tetrahydro-2-, -3- or -4-pyranyl,         1,4-dioxaneyl, 1,3-dioxane-2-, -4- or -5-yl, hexahydro-1-, -3-         or -4-pyridazinyl, hexahydro-1-, -2-, -4- or -5-pyrimidinyl or         1-, 2- or 3-piperazinyl, each unsubstituted or mono- or         disubstituted by F, Cl, CH₃, C₂H₅, CF₃, OCH₃, OC₂H₅, COCF₃,         SCH₃, SC₂H₅, N(CH₃)₂, NHCH₃, CH₂N(CH₃)₂ and/or N(C₂H₅)₂; and     -   Cyc denotes phenyl, which is unsubstituted, mono-, di- or         trisubstituted byHal, CN, R^(3a), OR^(3a), CONHR^(3a),         CONR^(3b)R^(3a), CONH₂, NR^(3a)COR^(3b), SO₂R^(3a), SOR^(3a),         NHR^(3a), N(R^(3a))₂, CH₂—Z, CH₂—SR^(3a), CH₂—N(R^(3a))₂, Ar3         and/or Het3;

or

-   -   1- or 2-naphthyl, 4- or 5- indanyl, 1-, 2-, 4-, 5- or 6-         azulenyl, 1- or 2-tetrahydronaphthalin 5- or 6-yl, 2- or         3-furyl, 2-, 3-, 4-, 5-, 6- or 7-benzofuryl,         2,3-dihydrobenzofuran-2- or 3-yl, 2-, 3-, 4-, 5-, 6- or         7-benzothiophenyl, benzodioxan-6- or 7-yl or         3,4-dihydro-1,5-benzodioxepin-6- or -7-yl, each, independently         form one another, unsubstituted or mono-, di- or trisubstituted         by Hal, CN, R^(3a), OR^(3a), CONHR^(3a), CONR^(3b)R^(3a), CONH₂,         NR^(3a)COR^(3b), SO₂R^(3a), SOR^(3a), NHR^(3a), N(R^(3a))₂,         CH₂—Z, CH₂—SR^(3a), CH₂—N(R^(3a))₂, Ar3 and/or Het3; and     -   Ar3 denotes phenyl unsubstituted or mono- or disubstituted by F,         Cl, CH₃, C₂H₅, CF₃, OCH₃, OC₂H₅, COCF₃, SCH₃, SC₂H₅, N(CH₃)₂,         NHCH₃, CH₂N(CH₃)₂ and/or N(C₂H₅)₂;     -   Het3 denotes 2- or 3-furyl, 2- or 3-thienyl, 1-, 2- or         3-pyrrolyl, 1-, 2-, 4- or 5-imidazolyl, 1-, 3-, 4- or         5-pyrazolyl, 2-, 4- or 5-oxazolyl, 3-, 4- or 5-isoxazolyl, 2-,         4- or 5-thiazolyl, 3-, 4- or 5-isothiazolyl, 2-, 3- or         4-pyridyl, 2-, 4-, 5- or 6-pyrimidinyl, furthermore preferably         1,2,3-triazol-1-, -4- or -5-yl, 1,2,4-triazol-1-, -3- or -5-yl,         1- or 5-tetrazolyl, 1,2,3-oxadiazol-4- or -5-yl,         1,2,4-oxadiazol-3- or -5-yl, 1,3,4-thiadiazol-2- or -5-yl,         1,2,4-thiadiazol-3- or -5-yl, 1,2,3-thiadiazol-4- or -5-yl, 3-         or 4-pyridazinyl or pyrazinyl, 2,3-dihydro-2-, -3-, -4- or         -5-furyl, 2,5-dihydro-2-, -3-, -4- or -5-furyl, tetrahydro-2- or         -3-furyl, 1,3-dioxolan-4-yl, tetrahydro-2- or -3-thienyl,         2,3-dihydro-1-, -2-, -3-, -4- or -5-pyrrolyl, 2,5-dihydro-1-,         -2-, -3-, -4- or -5-pyrrolyl, 1-, 2- or 3-pyrrolidinyl,         tetrahydro-1-, -2- or -4-imidazolyl, 2,3-dihydro-1-, -2-, -3-,         -4- or -5-pyrazolyl, tetrahydro-1-, -3- or -4-pyrazolyl,         1,4-dihydro-1-, -2-, -3- or -4-pyridyl, 1,2,3,4-tetrahydro-1-,         -2-, -3-, -4-, -5- or -6-pyridyl, 1-, 2-, 3- or 4-piperidinyl,         2-, 3- or 4-morpholinyl, tetrahydro-2-, -3- or -4-pyranyl,         1,4-dioxaneyl, 1,3-dioxane-2-, -4- or -5-yl, hexahydro-1-, -3-         or -4-pyridazinyl, hexahydro-1-, -2-, -4- or -5-pyrimidinyl, 1-,         2- or 3-piperaziny;     -   Z denotes OH, OCH₃, OCH₂CH₃, OCF₃, O—CH₂—CH₂—OH or         O—CH₂—CH₂—OCH₃; and     -   q denotes 1, 2, 3 or 4; and

and derivatives, prodrugs, solvates, tautomers or stereoisomers thereof, as well as the physiologically acceptable salts of each of the foregoing, including mixtures thereof in all ratios; with the provisio that compound (R)-(2-(benzofuran-3-yl)-1-(2-(N-methylmethylsulfonamido) acetamido)ethyl)boronic acid is excluded.

Another particular embodiment of the present invention comprises compounds of formula (I), wherein the stereogenic center at the carbon atom adjacent to the boronic acid residue shows an (R)-configuration

and wherein:

-   -   LX denotes —CH₂—, —CH₂—CH₂—, —CH₂—CH₂—CH₂—, —CH₂—CH₂—CH₂—CH₂—,         —CH₂—CH₂—O—CH₂— wherein 1 to 4 H atoms may be replaced by F or         Cl and/or 1 or 2 H atoms may be replaced by OH, methy, ethyl,         isopropyl, CF₃, CF₂CF₃, OCH₃, OCH₂CH₃, O—CH₂—CH₂—OH,         O—CH₂—CH₂—OCH₃, phenyl, tolyl, ethylphenyl, fluorophenyl,         chlorophenyl, bromophenyl, aminophenyl, furyl, thienyl,         pyrrolyl, imidazolyl, pyrazolyl, pyrimidyl, morpholinyl and/or         piperidinyl; and     -   LY denotes —CH₂— or —CH₂—CH₂— wherein 1 to 4 H atom may be         replaced by F or Cl and/or 1 or 2 H atoms may be replaced by OH,         methy, ethyl, isopropyl, CF₃, CF₂CF₃, OCH₃, OCH₂CH₃,         OCH₂—CH₂—OH, O—CH₂—CH₂—OCH₃; and     -   Y denotes Cyc; and     -   R¹, R² denote each, independently from one another H,         C1-C4-alkyl (preferably methyl or ethyl), or R¹ and R² form         together a residue according to formula (CE) as described above;         and     -   R^(3a), R^(3b) and R^(3c) denote each, independently from one         another, linear or branched C1-C3-alkyl, wherein 1 to 5 H atoms         may be replaced by F, Cl, OH and OAlk, wherein Alk is methyl or         ethyl; and     -   A denotes ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl         or tert-butyl, furthermore also pentyl, 1-, 2- or 3-methylbutyl,         1,1-, 1,2- or 2,2-dimethylpropyl, 1-ethylpropyl, hexyl, 1-, 2-,         3- or 4-methylpentyl, 1,1-, 1,2-, 1,3-, 2,2-, 2,3- or         3,3-dimethylbutyl, 1- or 2-ethylbutyl, 1-ethyl-1-methylpropyl or         1-ethyl-2-methylpropyl, each unsubstituted or mono-, di-, tri-         or tetrasubstituted by Hal, CN, R^(3a),OR^(3a), Ar1, Het1,         and/or (CH₂)_(q)—Z; and     -   Ar1 denotes phenyl, o-, m- or p-tolyl, o-, m- or p-ethylphenyl,         o-, m- or p-propylphenyl, o-, m- or p-isopropylphenyl, o-, m- or         p-tert-butylphenyl, o-, m- or p-hydroxyphenyl, o-, m- or         p-nitrophenyl, o-, m- or p-aminophenyl, o-, m- or         p-(N-methylamino)phenyl, o-, m- or         p-(N-methylaminocarbonyl)phenyl, o-, m- or p-acetamidophenyl,         o-, m- or p-methoxyphenyl, o-, m- or p-ethoxyphenyl, o-, m- or         p-(N,N-dimethylamino)phenyl, o-, m- or p-(N-ethylamino)phenyl,         o-, m- or p-(N,N-diethylamino)phenyl, o-, m- or p-fluorophenyl,         o-, m- or p-bromophenyl, o-, m- or p-chlorophenyl, o-, m- or         p-(methylsulfonyl)phenyl, o-, m- or p-methylsulfanylphenyl, o-,         m- or p-cyanophenyl, o-, m- or p-(3-oxomorpholin-4-yl)phenyl,         o-, m- or p-(piperidinyl)phenyl, o-, m- or         p-(morpholin-4-yl)phenyl, furthermore preferably 2,3-, 2,4-,         2,5-, 2,6-, 3,4- or 3,5-dimethylphenyl, 2,3-, 2,4-, 2,5-, 2,6-,         3,4- or 3,5-difluorophenyl, 2,3-, 2,4-, 2,5-, 2,6-, 3,4- or         3,5-dichlorophenyl, 2,3-, 2,4-, 2,5-, 2,6-, 3,4- or         3,5-dibromophenyl, 2,4- or 2,5-dinitrophenyl, 2,5- or         3,4-dimethoxyphenyl, 3-nitro-4-chlorophenyl, 3-amino-4-chloro-,         2-amino-3-chloro-, 2-amino-4-chloro-, 2-amino-5-chloro- or         2-amino-6-chlorophenyl, 2-nitro-4-N,N-dimethylamino- or         3-nitro-4-N,N-dimethylaminophenyl, 2,3-diaminophenyl, 2,3,4-,         2,3,5-, 2,3,6-, 2,4,6- or 3,4,5-trichlorophenyl,         2,4,6-trimethoxyphenyl, 2-hydroxy-3,5-dichlorophenyl,         p-iodophenyl, 3,6-dichloro-4-aminophenyl,         4-fluoro-3-chlorophenyl, 2-fluoro-4-bromophenyl,         2,5-difluoro-4-bromophenyl, 3-bromo-6-methoxyphenyl,         3-chloro-6-methoxyphenyl, 3-chloro-4-acetamidophenyl,         3-fluoro-4-methoxyphenyl, 3-amino-6-methylphenyl,         3-chloro-4-acetamidophenyl or 2,5-dimethyl-4-chloropheny; and     -   Het1 denotes 2- or 3-furyl, 2- or 3-thienyl, 1-, 2- or         3-pyrrolyl, 1-, 2-, 4- or 5-imidazolyl, 1-, 3-, 4- or         5-pyrazolyl, 2-, 4- or 5-oxazolyl, 3-, 4- or 5-isoxazolyl, 2-,         4- or 5-thiazolyl, 3-, 4- or 5-isothiazolyl, 2-, 3- or         4-pyridyl, 2-, 4-, 5- or 6-pyrimidinyl, furthermore preferably         1,2,3-triazol-1-, -4- or -5-yl, 1,2,4-triazol-1-, -3- or -5-yl,         1- or 5-tetrazolyl, 1,2,3-oxadiazol-4- or -5-yl,         1,2,4-oxadiazol-3- or -5-yl, 1,3,4-thiadiazol-2- or -5-yl,         1,2,4-thiadiazol-3- or -5-yl, 1,2,3-thiadiazol-4- or -5-yl, 3-         or 4-pyridazinyl or pyrazinyl, 2,3-dihydro-2-, -3-, -4- or         -5-furyl, 2,5-dihydro-2-, -3-, -4- or -5-furyl, tetrahydro-2- or         -3-furyl, 1,3-dioxolan-4-yl, tetrahydro-2- or -3-thienyl,         2,3-dihydro-1-, -2-, -3-, -4- or -5-pyrrolyl, 2,5-dihydro-1-,         -2-, -3-, -4- or -5-pyrrolyl, 1-, 2- or 3-pyrrolidinyl,         tetrahydro-1-, -2- or -4-imidazolyl, 2,3-dihydro-1-, -2-, -3-,         -4- or -5-pyrazolyl, tetrahydro-1-, -3- or -4-pyrazolyl,         1,4-dihydro-1-, -2-, -3- or -4-pyridyl, 1,2,3,4-tetrahydro-1-,         -2-, -3-, -4-, -5- or -6-pyridyl, 1-, 2-, 3- or 4-piperidinyl,         2-, 3- or 4-morpholinyl, tetrahydro-2-, -3- or -4-pyranyl,         1,4-dioxaneyl, 1,3-dioxane-2-, -4- or -5-yl, hexahydro-1-, -3-         or -4-pyridazinyl, hexahydro-1-, -2-, -4- or -5-pyrimidinyl, 1-,         2- or 3-piperazinyl; and     -   Cyc denotes phenyl, which is unsubstituted, mono-, di- or         trisubstituted by Hal, CN, R^(3a), OR^(3a), CONHR^(3a),         NR^(3a)COR^(3b), SO₂R^(3a), SOR^(3a), NHR^(3a), N(R^(3a))₂, Ar1,         Het 1 and/or (CH₂)_(q)—Z;

or

-   -   1- or 2-naphthyl, 4- or 5-indanyl, 1-, 2-, 4-, 5- or 6-azulenyl,         1- or 2-tetrahydronaphthalin 5- or 6-yl, 2- or 3-furyl, 2-, 3-,         4-, 5-, 6- or 7-benzofuryl, 2-, 3-, 4-, 5-, 6- or         7-benzothiophenyl, benzodioxan-6- or 7-yl or         3,4-dihydro-1,5-benzodioxepin-6- or -7-yl, each, independently         form one another, unsubstituted or mono-, di- or trisubstituted         by Hal, CN, R^(3a), OR^(3a), CONHR^(3a), NR^(3a)COR^(3b),         SO₂R^(3a), SOR^(3a), NHR^(3a), N(R^(3a))₂, Ar1, Het 1 and/or         (CH₂)_(q)—Z;

Z denotes OH, OCH₃, OCH₂CH₃, OCF₃, O—CH₂—CH₂—OH or O—CH₂—CH₂—OCH₃; and

-   -   q denotes 1, 2, 3 or 4; and

and derivatives, prodrugs, solvates, tautomers or stereoisomers thereof, as well as the physiologically acceptable salts of each of the foregoing, including mixtures thereof in all ratios; with the provisio that compound (R)-(2-(benzofuran-3-yl)-1-(2-(N-methylmethylsulfonamido) acetamido)ethyl)boronic acid is excluded.

Another particular embodiment of the present invention comprises compounds of formula (I) wherein:

-   -   LX denotes —CH₂—, —CH₂—CH₂—, —CH₂—CH₂—CH₂—, —CH₂—CH₂—CH₂—CH₂—,         —CH₂—CH₂—O—CH₂— wherein 1 to 4 H atoms may be replaced by F or         Cl and/or 1 or 2 H atoms may be replaced by OH, methy, ethyl,         isopropyl, CF₃, CF₂CF₃, OCH₃, OCH₂CH₃, OCH₂—CH₂—OH,         O—CH₂—CH₂—OCH₃, phenyl, tolyl, ethylphenyl, fluorophenyl,         chlorophenyl, bromophenyl, aminophenyl, furyl, thienyl,         pyrrolyl, imidazolyl, pyrazolyl, pyrimidyl, morpholinyl and/or         piperidinyl; and     -   LY denotes —CH₂— or —CH₂—CH₂— wherein 1 to 4 H atom may be         replaced by F or Cl and/or 1 or 2 H atoms may be replaced by OH,         methy, ethyl, isopropyl, CF₃, CF₂CF₃, OCH₃, OCH₂CH₃, OCH₂—CH₂—OH         and/or O—CH₂—CH₂—OCH₃; and     -   Y denotes Cyc; and     -   R¹, R² denote each, independently from one another H or         C1-C4-alkyl ,or R¹ and R² form together a residue according to         formula (CE) as described above; and     -   R^(3a), R^(3b) and R^(3c) denote each, independently from one         another, linear or branched C1-C3-alkyl, wherein 1 to 5 H atoms         may be replaced by F, Cl, OH and OAlk, wherein Alk is methyl or         ethyl; and     -   A denotes ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl         or tert-butyl, furthermore also pentyl, 1-, 2- or 3-methylbutyl,         1,1-, 1,2- or 2,2-dimethylpropyl, 1-ethylpropyl, hexyl, 1-, 2-,         3- or 4-methylpentyl, 1,1-, 1,2-, 1,3-, 2,2-, 2,3- or         3,3-dimethylbutyl, 1- or 2-ethylbutyl, 1-ethyl-1-methylpropyl or         1-ethyl-2-methylpropyl, each unsubstituted or mono-, di-, tri-         or tetrasubstituted by Hal, CN, R^(3a), SR^(3a),OR^(3a), Ar1,         Het1, and/or (CH₂)_(q)—Z; and     -   Ar1 denotes phenyl, o-, m- or p-tolyl, o-, m- or p-ethylphenyl,         o-, m- or p-propyl-phenyl, o-, m- or p-isopropylphenyl, o-, m-         or p-tert-butylphenyl, o-, m- or p-hydroxyphenyl, o-, m- or         p-nitrophenyl, o-, m- or p-aminophenyl, o-, m- or         p-(N-methylamino)phenyl, o-, m- or         p-(N-methylaminocarbonyl)phenyl, o-, m- or p-acetamidophenyl,         o-, m- or p-methoxyphenyl, o-, m- or p-ethoxyphenyl, o-, m- or         p-(N,N-dimethylamino)phenyl, o-, m- or p-(N-ethylamino)phenyl,         o-, m- or p-(N,N-diethylamino)phenyl, o-, m- or p-fluorophenyl,         o-, m- or p-bromophenyl, o-, m- or p-chlorophenyl, o-, m- or         p-(methylsulfonyl)phenyl, o-, m- or p-methylsulfanylphenyl, o-,         m- or p-cyanophenyl, o-, m- or p-(3-oxomorpholin-4-yl)phenyl,         o-, m- or p-(piperidinyl)phenyl, o-, m- or         p-(morpholin-4-yl)phenyl, furthermore preferably 2,3-, 2,4-,         2,5-, 2,6-, 3,4- or 3,5-dimethylphenyl, 2,3-, 2,4-, 2,5-, 2,6-,         3,4- or 3,5-difluorophenyl, 2,3-, 2,4-, 2,5-, 2,6-, 3,4- or         3,5-dichlorophenyl, 2,3-, 2,4-, 2,5-, 2,6-, 3,4- or         3,5-dibromophenyl, 2,4- or 2,5-dinitrophenyl, 2,5- or         3,4-dimethoxyphenyl, 3-nitro-4-chlorophenyl, 3-amino-4-chloro-,         2-amino-3-chloro-, 2-amino-4-chloro-, 2-amino-5-chloro- or         2-amino-6-chlorophenyl, 2-nitro-4-N,N-dimethylamino- or         3-nitro-4-N,N-dimethylaminophenyl, 2,3-diaminophenyl, 2,3,4-,         2,3,5-, 2,3,6-, 2,4,6- or 3,4,5-trichlorophenyl,         2,4,6-trimethoxyphenyl, 2-hydroxy-3,5-dichlorophenyl,         p-iodophenyl, 3,6-dichloro-4-aminophenyl,         4-fluoro-3-chlorophenyl, 2-fluoro-4-bromophenyl,         2,5-difluoro-4-bromophenyl, 3-bromo-6-methoxyphenyl,         3-chloro-6-methoxyphenyl, 3-chloro-4-acetamidophenyl,         3-fluoro-4-methoxyphenyl, 3-amino-6-methylphenyl,         3-chloro-4-acetamidophenyl or 2,5-dimethyl-4-chlorophenyl; and     -   Het1 denotes 2- or 3-furyl, 2- or 3-thienyl, 1-, 2- or         3-pyrrolyl, 1-, 2-, 4- or 5-imidazolyl, 1-, 3-, 4- or         5-pyrazolyl, 2-, 4- or 5-oxazolyl, 3-, 4- or 5-isoxazolyl, 2-,         4- or 5-thiazolyl, 3-, 4- or 5-isothiazolyl, 2-, 3- or         4-pyridyl, 2-, 4-, 5- or 6-pyrimidinyl, furthermore preferably         1,2,3-triazol-1-, -4- or -5-yl, 1,2,4-triazol-1-, -3- or -5-yl,         1- or 5-tetrazolyl, 1,2,3-oxadiazol-4- or -5-yl,         1,2,4-oxadiazol-3- or -5-yl, 1,3,4-thiadiazol-2- or -5-yl,         1,2,4-thiadiazol-3- or -5-yl, 1,2,3-thiadiazol-4- or -5-yl, 3-         or 4-pyridazinyl or pyrazinyl, 2,3-dihydro-2-, -3-, -4- or         -5-furyl, 2,5-dihydro-2-, -3-, -4- or -5-furyl, tetrahydro-2- or         -3-furyl, 1,3-dioxolan-4-yl, tetrahydro-2- or -3-thienyl,         2,3-dihydro-1-, -2-, -3-, -4- or -5-pyrrolyl, 2,5-dihydro-1-,         -2-, -3-, -4- or -5-pyrrolyl, 1-, 2- or 3-pyrrolidinyl,         tetrahydro-1-, -2- or -4-imidazolyl, 2,3-dihydro-1-, -2-, -3-,         -4- or -5-pyrazolyl, tetrahydro-1-, -3- or -4-pyrazolyl,         1,4-dihydro-1-, -2-, -3- or -4-pyridyl, 1,2,3,4-tetrahydro-1-,         -2-, -3-, -4-, -5- or -6-pyridyl, 1-, 2-, 3- or 4-piperidinyl,         2-, 3- or 4-morpholinyl, tetrahydro-2-, -3- or -4-pyranyl,         1,4-dioxaneyl, 1,3-dioxane-2-, -4- or -5-yl, hexahydro-1-, -3-         or -4-pyridazinyl, hexahydro-1-, -2-, -4- or -5-pyrimidinyl, 1-,         2- or 3-piperazinyl; and     -   Cyc denotes 3-benzofuryl or 2,3-dihydrobenzofuran-3-yl, each         independently from one another unsubstituted or mono-, di- or         trisubstituted by Hal, CN, R^(3a), OR^(3a), CONHR^(3a),         CONR^(3b)R^(3a), CONH₂, NR^(3a)COR^(3b), SO₂R^(3a), SOR^(3a),         NHR^(3a), N(R^(3a))₂, CH₂—Z, CH₂—SR^(3a) or CH₂—N(R^(3a))₂;     -   Z denotes OH, OCH₃, OCH₂CH₃, OCF₃, O—CH₂—CH₂—OH or         O—CH₂—CH₂—OCH₃;     -   q denotes 1, 2, 3 or 4; and

and derivatives, prodrugs, solvates, tautomers or stereoisomers thereof, as well as the physiologically acceptable salts of each of the foregoing, including mixtures thereof in all ratios; with the provisio that compound (R)-(2-(benzofuran-3-yl)-1-(2-(N-methylmethylsulfonamido) acetamido)ethyl)boronic acid is excluded.

Another specific embodiment of the invention comprisies compounds, wherein:

-   -   LX denotes-CH₂—, —CH₂—CH₂—, —CH₂—CH₂—CH₂—, —CH₂—CH₂—CH₂—CH₂—,         —CH₂—CH₂—O—CH₂— wherein 1 to 4 H atoms may be replaced by F or         Cl and/or 1 or 2 H atoms may be replaced by OH, methy, ethyl,         isopropyl, CF₃, CF₂CF₃, OCH₃, OCH₂CH₃, OCH₂—CH₂—OH,         O—CH₂—CH₂—OCH₃, phenyl, tolyl, ethylphenyl, fluorophenyl,         chlorophenyl, bromophenyl, aminophenyl, furyl, thienyl,         pyrrolyl, imidazolyl, pyrazolyl, pyrimidyl, morpholinyl and/or         piperidinyl; and     -   LY denotes —CH₂— or —CH₂—CH₂— wherein 1 to 4 H atom may be         replaced by F or Cl and/or 1 or 2 H atoms may be replaced by OH,         methy, ethyl, isopropyl, CF₃, CF₂CF₃, OCH₃, OCH₂CH₃, OCH₂—CH₂—OH         and/or O—CH₂—CH₂—OCH₃;and     -   Y denotes Cyc; and     -   R¹, R² denote each, independently from one another H or         C1-C4-alkyl ,or R¹ and R² form together a residue according to         formula (CE) as described above; and     -   R^(3a), R^(3b) and R^(3c) denote each, independently from one         another, linear or branched C1-C3-alkyl, wherein 1 to 5 H atoms         may be replaced by F, Cl, OH and OAlk, wherein Alk is methyl or         ethyl; and     -   A denotes ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl         or tert-butyl, furthermore also pentyl, 1-, 2- or 3-methylbutyl,         1,1-, 1,2- or 2,2-dimethylpropyl, 1-ethylpropyl, hexyl, 1-, 2-,         3- or 4-methylpentyl, 1,1-, 1,2-, 1,3-, 2,2-, 2,3- or         3,3-dimethylbutyl, 1- or 2-ethylbutyl, 1-ethyl-1-methylpropyl or         1-ethyl-2-methylpropyl, each unsubstituted or mono-, di-, tri-         or tetrasubstituted by Hal, CN, R^(3a), SR^(3a) ,OR^(3a), An,         Het1, and/or (CH₂)_(q)—Z; and     -   Ar1 denotes phenyl, o-, m- or p-tolyl, o-, m- or p-ethylphenyl,         o-, m- or p-propylphenyl, o-, m- or p-isopropylphenyl, o-, m- or         p-tert-butylphenyl, o-, m- or p-hydroxyphenyl, o-, m- or         p-nitrophenyl, o-, m- or p-aminophenyl, o-, m- or         p-(N-methylamino)phenyl, o-, m- or         p-(N-methylaminocarbonyl)phenyl, o-, m- or p-acetamidophenyl,         o-, m- or p-methoxyphenyl, o-, m- or p-ethoxyphenyl, o-, m- or         p-(N,N-dimethylamino)phenyl, o-, m- or p-(N-ethylamino)phenyl,         o-, m- or p-(N,N-diethylamino)phenyl, o-, m- or p-fluorophenyl,         o-, m- or p-bromophenyl, o-, m- or p-chlorophenyl, o-, m- or         p-(methylsulfonyl)phenyl, o-, m- or p-methylsulfanylphenyl, o-,         m- or p-cyanophenyl, o-, m- or p-(3-oxomorpholin-4-yl)phenyl,         o-, m- or p-(piperidinyl)phenyl, o-, m- or         p-(morpholin-4-yl)phenyl, furthermore preferably 2,3-, 2,4-,         2,5-, 2,6-, 3,4- or 3,5-dimethylphenyl, 2,3-, 2,4-, 2,5-, 2,6-,         3,4- or 3,5-difluorophenyl, 2,3-, 2,4-, 2,5-, 2,6-, 3,4- or         3,5-dichlorophenyl, 2,3-, 2,4-, 2,5-, 2,6-, 3,4- or         3,5-dibromophenyl, 2,4- or 2,5-dinitrophenyl, 2,5- or         3,4-dimethoxyphenyl, 3-nitro-4-chlorophenyl, 3-amino-4-chloro-,         2-amino-3-chloro-, 2-amino-4-chloro-, 2-amino-5-chloro- or         2-amino-6-chlorophenyl, 2-nitro-4-N,N-dimethylamino- or         3-nitro-4-N,N-dimethylaminophenyl, 2,3-diaminophenyl, 2,3,4-,         2,3,5-, 2,3,6-, 2,4,6- or 3,4,5-trichlorophenyl,         2,4,6-trimethoxyphenyl, 2-hydroxy-3,5-dichlorophenyl,         p-iodophenyl, 3,6-dichloro-4-aminophenyl,         4-fluoro-3-chlorophenyl, 2-fluoro-4-bromophenyl,         2,5-difluoro-4-bromophenyl, 3-bromo-6-methoxyphenyl,         3-chloro-6-methoxyphenyl, 3-chloro-4-acetamidophenyl,         3-fluoro-4-methoxyphenyl, 3-amino-6-methylphenyl,         3-chloro-4-acetamidophenyl or 2,5-dimethyl-4-chlorophenyl; and     -   Het1 denotes 2- or 3-furyl, 2- or 3-thienyl, 1-, 2- or         3-pyrrolyl, 1-, 2-, 4- or 5-imidazolyl, 1-, 3-, 4- or         5-pyrazolyl, 2-, 4- or 5-oxazolyl, 3-, 4- or 5-isoxazolyl, 2-,         4- or 5-thiazolyl, 3-, 4- or 5-isothiazolyl, 2-, 3- or         4-pyridyl, 2-, 4-, 5- or 6-pyrimidinyl, furthermore preferably         1,2,3-triazol-1-, -4- or -5-yl, 1,2,4-triazol-1-, -3- or -5-yl,         1- or 5-tetrazolyl, 1,2,3-oxadiazol-4- or -5-yl,         1,2,4-oxadiazol-3- or -5-yl, 1,3,4-thiadiazol-2- or -5-yl,         1,2,4-thiadiazol-3- or -5-yl, 1,2,3-thiadiazol-4- or -5-yl, 3-         or 4-pyridazinyl or pyrazinyl, 2,3-dihydro-2-, -3-, -4- or         -5-furyl, 2,5-dihydro-2-, -3-, -4- or -5-furyl, tetrahydro-2- or         -3-furyl, 1,3-dioxolan-4-yl, tetrahydro-2- or -3-thienyl,         2,3-dihydro-1-, -2-,. -3-, -4- or -5-pyrrolyl, 2,5-dihydro-1-,         -2-, -3-, -4- or -5-pyrrolyl, 1-, 2- or 3-pyrrolidinyl,         tetrahydro-1-, -2- or -4-imidazolyl, 2,3-dihydro-1-, -2-, -3-,         -4- or -5-pyrazolyl, tetrahydro-1-, -3- or -4-pyrazolyl,         1,4-dihydro-1-, -2-, -3- or -4-pyridyl, 1,2,3,4-tetrahydro-1-,         -2-, -3-, -4-, -5- or -6-pyridyl, 1-, 2-, 3- or 4-piperidinyl,         2-, 3- or 4-morpholinyl, tetrahydro-2-, -3- or -4-pyranyl,         1,4-dioxaneyl, 1,3-dioxane-2-, -4- or -5-yl, hexahydro-1-, -3-         or -4-pyridazinyl, hexahydro-1-, -2-, -4- or -5-pyrimidinyl, 1-,         2- or 3-piperazinyl; and     -   Cyc denotes 2,4-, 3,4-, or 2,3,4-substituted phenyl or         unsubstituted or mono- or disubstituted 1- or 2-naphthyl,         wherein the subsitutents are each, independently from one         another, selected from a group consisting of Hal, CN, R^(3a),         OR^(3a), CONHR^(3a), CONR^(3b)R^(3a), CONH₂, NR^(3a)COR^(3b),         SO₂R^(3a), SOR^(3a), NHR^(3a), N(R^(3a))₂, CH₂—Z, CH₂—SR^(3a),         CH₂—N(R³a)₂;     -   or     -   is a residue according to formula (Fa7) or (S)-(Fb7)

wherein

-   -   G^(a) denotes F, Cl, CH₃, C₂H₅, CF₃, OCH₃, OC₂H₅, COCF₃, SCH₃,         SC₂H₅, CH₂OCH₃, N(CH₃)₂, CH₂N(CH₃)₂ or N(C₂H₅)₂;     -   G^(b) denotes H, F, Cl, CH₃, C₂H₅, CF₃, OCH₃, OC₂H₅, COCF₃,         SCH₃, SC₂H₅, CH₂OCH₃, N(CH₃)₂, CH₂N(CH₃)₂ or N(C₂H₅)₂;     -   K^(a), K^(b) denote each, independently from one another, H, F,         Cl, CH₃, C₂H₅, CF₃, OCH₃, OC₂H₅, COCF₃, SCH₃, SC₂H₅, CH₂OCH₃,         N(CH₃)₂, CH₂N(CH₃)₂ or N(C₂H₅)₂;     -   Z denotes OH, OCH₃, OCH₂CH₃, OCF₃, O—CH₂—CH₂—OH or         O—CH₂—CH₂—OCH₃;     -   q denotes 1, 2, 3 or 4; and

and derivatives, prodrugs, solvates, tautomers or stereoisomers thereof, as well as the physiologically acceptable salts of each of the foregoing, including mixtures thereof in all ratios; with the provisio that compound (R)-(2-(benzofuran-3-yl)-1-(2-(N-methylmethylsulfonamido) acetamido)ethyl)boronic acid is excluded.

In general, the residues included in formula (I) have preferably following meaning:

LX denotes preferably —CH₂—, —CH₂—CH₂—, —CH₂—CH₂—CH₂— or —CH₂—CH₂—CH₂—CH₂— wherein 1 to 4 H atoms may be replaced by Hal and/or 1 or 2 H atoms may be replaced by R^(3a), Ar1 and/or Het1, and/or wherein 1 or 2 non-adjacent CH₂ groups may be replaced by O, SO and/or SO₂. However, the maximum number of H atoms, which may be replaced is LX is 5. Most preferably LX denotes —CH₂—, —CH₂—CH₂—, —CH₂—CH₂—CH₂—, —CH₂—CH₂—CH₂—CH₂—, —CH₂—CH₂—O—CH₂— wherein 1 to 4 H atoms may be replaced by F or Cl and/or 1 or 2 H atoms may be replaced by OH, methy, ethyl, isopropyl, CF₃, CF₂CF₃, OCH₃, OCH₂CH₃, O—CH₂—CH₂—OH, O—CH₂—CH₂—OCH₃, phenyl, tolyl, ethylphenyl, fluorophenyl, chlorophenyl, bromophenyl, aminophenyl, furyl, thienyl, pyrrolyl, imidazolyl, pyrazolyl, pyrimidyl, morpholinyl and/or piperidinyl.

LY denotes preferably —CH₂—, —CH₂—CH₂— or —CH₂—CH₂—CH₂— wherein 1 to 4 H atoms may be replaced by Hal and/or 1 H atom may be replaced by R^(3a), Ar1 and/or Het1, and/or wherein 1 or 2 non-adjacent CH₂ groups may be replaced by O, SO and/or SO₂. However, the maximum number of H atoms, which may be replaced is LX is 5. Most preferably LY denotes —CH₂—, —CH₂—CH₂—, —CH₂—CH₂—CH₂—, —CH₂—CH₂—CH₂—CH₂—, —CH₂—CH₂—O—CH₂— wherein 1 to 4 H atom may be replaced by F or Cl and/or 1 or 2 H atoms may be replaced by OH, methy, ethyl, isopropyl, CF₃, CF₂CF₃, OCH₃, OCH₂CH₃, O—CH₂—CH₂—OH and/or O—CH₂—CH₂—OCH₃.

In very specific embodiments X denotes preferably NR^(4a)COR^(4b), SO₂R⁶, NR^(10a)SO₂R^(10b) or NHSO₂R¹¹.

R¹, R² denote preferably each, independently from one another methyl, ethyl or R¹ and R² form together a residue according to formula (CE) as described above.

R^(3a), R^(3b), R^(3c) denote preferably each, independently from one another, linear or branched C1-, C2-, C3- or C4 alkyl, wherein 1 to 5 H atoms may be replaced by F, Cl, OH and OAlk, wherein Alk is preferably methyl or ethyl. Most preferably R^(3a), R^(3b), R^(3c) denote each, independently from one another, methyl, ethyl, (n-)propyl or iso-propyl, wherein one, two or three H atoms are replaced by F, Cl, OH, OCH₃ or OC₂H₅.

In embodiments were A is linear or branched C1-C6-alkyl it denotes preferably methyl, furthermore ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl, tert-butyl, pentyl, 1-, 2- or 3-methylbutyl, 1,1-, 1,2- or 2,2-dimethylpropyl, 1-ethylpropyl, hexyl, 1-, 2-, 3- or 4-methylpentyl, 1,1-, 1,2-, 1,3-, 2,2-, 2,3- or 3,3-dimethylbutyl, 1- or 2-ethylbutyl, 1-ethyl-1-methylpropyl, 1-ethyl-2-methylpropyl, 1,1,2- or 1,2,2-trimethylpropyl, each unsubstituted or mono-, di- or trisubstituted by Hal (preferably F or Cl), CN, R^(3a), SR^(3a), OR^(3a), An, Het1, and/or (CH₂)_(q)—Z. Most preferably A is selected from a group consisting of methyl, furthermore ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl, tert-butyl, pentyl, 1-, 2- or 3-methylbutyl, 1,1-, 1,2- or 2,2-dimethylpropyl, 1-ethylpropyl, hexyl, 1-, 2-, 3- or 4-methylpentyl, 1,1-, 1,2-, 1,3-, 2,2-, 2,3- or 3,3-dimethylbutyl, 1- or 2-ethylbutyl, 1-ethyl-1-methylpropyl, 1-ethyl-2-methylpropyl and 1,1,2- or 1,2,2-trimethylpropyl,

In embodiments were A is a cyclic alkyl group (cycloalkyl) it preferably denotes cyclopropyl, cyclobutyl, cyclopentyl or cyclohexyl, each unsubstituted or mono-, di- or trisubstituted by Hal (preferably F or Cl), CN, R^(3a), SR^(3a), OR^(3a), Ar1, Het1, and/or (CH₂)_(q)—Z. In other particular embodiments were A is a cyclic alkyl group (cycloalkyl) it preferably denotes cyclopropyl, cyclobutyl, cyclopentyl or cyclohexyl, each unsubstituted or mono-, di- or trisubstituted by Hal (preferably F or Cl), CN, R^(3a), OR^(3a), Art, Het1, and/or (CH₂)_(q)—Z. Most preferably it denotes cyclopropyl or cyclopentyl, each unsubstituted or mono- or di- by R^(3a) or Hal (preferably F or Cl). In specific embodimtents A is unsubstituted cyclopropyl or cyclopentyl.

Ar1 can for example denote phenyl, o-, m- or p-tolyl, o-, m- or p-ethylphenyl, o-, m- or p-propylphenyl, o-, m- or p-isopropylphenyl, o-, m- or p-tert-butylphenyl, o-, m- or p-hydroxyphenyl, o-, m- or p-nitrophenyl, o-, m- or p-aminophenyl, o-, m- or p-(N-methylamino)phenyl, o-, m- or p-(N-methylaminocarbonyl)phenyl, o-, m- or p-acetamidophenyl, o-, m- or p-methoxyphenyl, o-, m- or p-ethoxyphenyl, o-, m- or p-(N,N-dimethylamino)phenyl, o-, m- or p-(N-ethylamino)phenyl, o-, m- or p-(N,N-diethylamino)phenyl, o-, m- or p-fluorophenyl, o-, m- or p-bromophenyl, o-, m- or p-chlorophenyl, o-, m- or p-(methylsulfonyl)phenyl, o-, m- or p-methylsulfanylphenyl, o-, m- or p-cyanophenyl, o-, m- or p-(3-oxomorpholin-4-yl)phenyl, o-, m- or p-(piperidinyl)phenyl, o-, m- or p-(morpholin-4-yl)phenyl, o-, m- or p-trifluormethyl-phenyl or o-, m- or p-trichlormethylphenyl, -furthermore preferably 2,3-, 2,4-, 2,5-, 2,6-, 3,4- or 3,5-dimethylphenyl, 2,3-, 2,4-, 2,5-, 2,6-, 3,4- or 3,5-difluorophenyl, 2,3-, 2,4-, 2,5-, 2,6-, 3,4- or 3,5-dichlorophenyl, 2,3-, 2,4-, 2,5-, 2,6-, 3,4- or 3,5-dibromophenyl, 2,4- or 2,5-dinitrophenyl, 2,5- or 3,4-dimethoxyphenyl, 3-nitro-4-chlorophenyl, 3-amino-4-chloro-, 2-amino-3-chloro-, 2-amino-4-chloro-, 2-amino-5-chloro- or 2-amino-6-chlorophenyl, 2-nitro-4-N,N-dimethylamino- or 3-nitro-4-N,N-dimethylaminophenyl, 2,3-diaminophenyl, 2,3,4-, 2,3,5-, 2,3,6-, 2,4,6- or 3,4,5-trichiorophenyl, 2,4,6-trimethoxyphenyl, 2-hydroxy-3,5-dichlorophenyl, p-iodophenyl, 3,6-dichloro-4-aminophenyl, 4-fluoro-3-chlorophenyl, 2-fluoro-4-bromophenyl, 2,5-difluoro-4-bromophenyl, 3-bromo-6-methoxyphenyl, 3-chloro-6-methoxyphenyl, 3-chloro-4-acetamidophenyl, 3-fluoro-4-methoxyphenyl, 3-amino-6-methylphenyl, 3-chloro-4-acetamidophenyl or 2,5-dimethyl-4-chlorophenyl.

Most preferably Ar1 denotes, phenyl which is unsubstituted, mono-, di or trisubstituted by F, Cl, Br, OCH₃, CH₂OCH₃, CH₃, C₂H₅, CF₃, phenyl, biphenyl, naphtyl, furyl, thienyl, pyrrolyl, imidazolyl, morpholinyl, piperazinyl, benzofuryl, benzodioxolyl and/or pyridyl. Het1 can for example denote 2- or 3-furyl, 2- or 3-thienyl, 1-, 2- or 3-pyrrolyl, 1-, 2-, 4- or 5-imidazolyl, 1-, 3-, 4- or 5-pyrazolyl, 2-, 4- or 5-oxazolyl, 3-, 4- or 5-isoxazolyl, 2-, 4- or 5-thiazolyl, 3-, 4- or 5-isothiazolyl, 2-, 3- or 4-pyridyl, 2-, 4-, 5- or 6-pyrimidinyl, furthermore preferably 1,2,3-triazol-1-, -4- or -5-yl, 1,2,4-triazol-1-, -3- or -5-yl, 1- or 5-tetrazolyl, 1,2,3-oxadiazol-4- or -5-yl, 1,2,4-oxadiazol-3- or -5-yl, 1,3,4-thiadiazol-2- or -5-yl, 1,2,4-thiadiazol-3- or -5-yl, 1,2,3-thiadiazol-4- or -5-yl, 3- or 4-pyridazinyl or pyrazinyl, each unsubstituted or mono-, di-, tri-, tetra- or pentasubstituted (preferably unsubstituted or mono-, di- or trisubstituted) by Hal, CN, R^(3a), OR^(3a), CONHR^(3a), NR^(3a)COR^(3b), SO₂R^(3a), SOR^(3a), NH₂, NHR^(3a), N(R^(3a))₂, Ar2, Het2 and/or (CH₂)_(q)—Z. In such embodiments Het1 is most preferably unsubstituted or mono-, di or trisubstituted (most preferably monosubstituted), by F, Cl, Br, OCH₃, CH₂OCH₃, CH₃, CF₃, phenyl, biphenyl, naphtyl, furyl, thienyl, pyrrolyl, imidazolyl, morpholinyl, piperazinyl, benzofuryl, benzodioxolyl and/or pyridyl.

However, Het1 may also be partially or fully hydrogenated. Thus, Het1 can also denote, for example, 2,3-dihydro-2-, -3-, -4- or -5-furyl, 2,5-dihydro-2-, -3-, -4- or -5-furyl, tetrahydro-2- or -3-furyl, 1,3-dioxolan-4-yl, tetrahydro-2- or -3-thienyl, 2,3-dihydro-1-, -2-, -3-, -4- or -5-pyrrolyl, 2,5-dihydro-1-, -2-, -3-, -4- or -5-pyrrolyl, 1-, 2- or 3-pyrrolidinyl, tetrahydro-1-, -2- or -4-imidazolyl, 2,3-dihydro-1-, -2-, -3-, -4- or -5-pyrazolyl, tetrahydro-1-, -3- or -4-pyrazolyl, 1,4-dihydro-1-, -2-, -3- or -4-pyridyl, 1,2,3,4-tetrahydro-1-, -2-, -3-, -4-, -5- or -6-pyridyl, 1-, 2-, 3- or 4-piperidinyl, 2-, 3- or 4-morpholinyl, tetrahydro-2-, -3- or -4-pyranyl, 1,4-dioxaneyl, 1,3-dioxane-2-, -4- or -5-yl, hexahydro-1-, -3- or -4-pyridazinyl, hexahydro-1-, -2-, -4- or -5-pyrimidinyl or 1-, 2- or 3-piperazinyl, each unsubstituted or mono-, di-, tri-, tetra- or pentasubstituted pentasubstituted (preferably unsubstituted, mono-, di- or trisubstituted) by Hal (preferably F or Cl), CN, R^(3a), OR^(3a), CONHR^(3a), NR^(3a)COR^(3b), SO₂R^(3a), SOR^(3a), NH₂, NHR^(3a), N(R^(3a))₂, Ar2, Het2 and/or (CH₂)_(q)—Z. In these embodiments Het1 is preferably unsubstituted or mono-, di or trisubstituted (most preferably monosubstituted), by F, Cl, Br, OCH₃, CH₂OCH₃, CH₃, CF₃, phenyl, biphenyl, naphtyl, furyl, thienyl, pyrrolyl, imidazolyl, morpholinyl, piperazinyl, benzofuryl, benzodioxolyl and/or pyridyl.

Cyc denotes preferably phenyl, 1- or 2-naphthyl, 4- or 5- indanyl, 1-, 2-, 4-, 5- or 6-azulenyl, 1- or 2-tetrahydronaphthalin 5- or 6-yl, 2- or 3-furyl, 2-, 3-, 4-, 5-, 6- or 7-benzofuryl, 2-, 3-, 4-, 5-, 6- or 7-benzothiophenyl, 2methylenedioxyphenylbenzodioxan 6-or 7-yl or 3,4-dihydro1,5-benzodioxepin-6- or -7-yl, each independently from one another unsubstituted, mono-, di- or trisubstituted by Hal (preferably F or Cl), CN, R^(3a), OR^(3a), CONHR^(3a), NR^(3a)COR^(3b), SO₂R^(3a), SOR^(3a), NH₂, NHR^(3a), N(R^(3a))₂, Ar1, Het1 and/or (CH₂)_(q)—Z. Most preferably Cyc denotes phenyl, 4- or 5-indanyl, 1- or 2-naphthyl, 1,2,3,4-tetrahydronaphthalin 5- or 6-yl, or 2-, 3-, 4-, 5-, 6- or 7-benzofuranyl, each independently from one another, unsubstituted, mono-, disubstituted or trisubstituted by CH₃, C₂H₅, CH₂OCH₃, OCH₃, F, Cl, or CF₃. In case Cyc denotes a disubstituted phenyl the substituents are preferably in 2,4-, 2,5- or 3,4-position, most preferably in 2,4- or 3,4-position. In case Cyc denotes a trisubstituted phenyl the substituents are preferably in 2,3,4-position.

In particular Cyc can denote o-, m- or p-tolyl, o-, m- or p-ethylphenyl, o-, m- or p-propylphenyl, o-, m- or p-isopropylphenyl, o-, m- or p-tert-butylphenyl, o-, m- or p-acetamidophenyl, o-, m- or p-methoxyphenyl, o-, m- or p-ethoxyphenyl, o-, m- or p-fluorophenyl, o-, m- or p-bromophenyl, o-, m- or p-chlorophenyl, o-, m- or p-trifluormethyl-phenyl, o-, m- or p-trichlormethyl-phenyl , o-, m- or p-(methylsulfonyl)phenyl, o-, m- or p-phenoxyphenyl, o-, m- or p-methoxymethyl-phenyl further preferably 2,4-, 2,5-, 2,6- or 3,4-dimethylphenyl, 2,4-, 2,5- or 3,4-difluorophenyl, 2,4-, 2,5- or 3,4- -dichlorophenyl, 2,4-, 2,5- or 3,4-dibromophenyl, 2,5- or 3,4-dimethoxyphenyl, 2,3,4-, 2,3,5-, 2,3,6-, 2,4,6- or 3,4,5-trichlorophenyl, 2,3,4-, 2,3,5-, 2,3,6-, 2,4,6- or 3,4,5-trifluorophenyl, 2,3,4-, 2,3,5-, 2,3,6-, 2,4,6- or 3,4,5-trimethylphenyl, 2,3,4-, 2,3,5-, 2,3,6-, 2,4,6- or 3,4,5-tristrifluormethyl-phenyl, 2,3,4-, 2,3,5-, 2,3,6-, 2,4,6- or 3,4,5-tristrichlormethyl-phenyl, 2,3,4-, 2,3,5-, 2,3,6-, 2,4,6- or 3,4,5-trimethoxymethyl-phenyl, 2,4,6-trimethoxyphenyl, p-iodophenyl, 2-fluoro-3-chlorophenyl, 2-fluoro-3-bromophenyl, 2,3-difluoro-4-bromophenyl, 3-bromo-3-methoxyphenyl, 2-chloro-3-methoxyphenyl, 2-fluoro -3-methoxyphenyl, 2-chloro-3-acetamidophenyl, 2-fluoro-3-methoxyphenyl, 2-chloro-3-acetamidophenyl, 2,3-dimethyl-4-chlorophenyl, 2,3-dimethyl-4-fluorophenyl.

Cyc can also denote 1- or 2-naphthyl, 4- or 5- indanyl, 1-, 2-, 4-, 5- or 6- azulenyl, 1- or 2-tetrahydronaphthalin 5- or 6-yl, 2- or 3-furyl, 2-, 3-, 4-, 5-, 6- or 7-benzofuryl, 2-, 3-, 4-, 5-, 6- or 7-benzothiophenyl, methylenedioxyphenylbenzodioxan-6- or 7-yl or 3,4-dihydro-1,5-benzodioxepin-6- or -7-yl, each independently form one another unsubstituted or mono-, di- or trisubstituted by Hal, CN, R^(3a), OR^(3a), CONHR^(3a), NR^(3a)COR^(3b), SO₂R^(3a), SOR^(3a), NH₂, NHR^(3a), N(R^(3a))₂, Ar1, Het 1 and/or (CH₂)_(q)—Z. Particular preferred subsitutents of Cyc are selected from a group comprising Hal, CN, R^(3a), OR^(3a).

Z denotes preferably OH, OCH₃, OCH₂CH₃, OCF₃, O—CH₂—CH₂—OH or O—CH₂—CH₂—OCH₃.

n denotes preferably 1, 2, 3 or 4, more preferably n is 2, 3 or 4 and most preferably n is 2 or 3.

m denotes preferably 0, 1 or 2, more 1 or 2 and most preferably 1.

q denotes preferably 1, 2, 3 or 4, more preferably n is 2, 3 or 4 and most preferably n is 1, 2 or 3.

In the context of the present invention “C1-C6-alkyl” means an alkyl moiety having 1, 2, 3, 4, 5 or 6 carbon atoms and being straight-chain or branched. . The term “C1-C4-alkyl” means an alkyl moiety having 1, 2, 3 or 4 carbon atoms and being straight-chain or branched. The term “C3-C6-cycloalkyl” refers to saturated cyclic hydrocarbon groups having 3, 4, 5 or 6 carbon atoms.

The term “unsubstituted” means that the corresponding radical, group or moiety has no substituents other than H; the term “substituted” means that the corresponding radical, group or moiety has one or more substituents. Where a radical has a plurality of substituents, i.e. at least two, and a selection of various substituents is specified, the substituents are selected independently of one another and do not need to be identical.

Amino refers to the group —NRR′, wherein R and R′ are each independently from one another H or linear or branched C1-C6-alkyl (particularly methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl or tert-butyl, pentyl, hexyl).

The group “CO” as e.g. included in the COR^(a), is group, wherein C and O are connected via a double bond (C═O).

In specific preferred embodiments R^(4a), R^(4b), R^(5a), R^(5b), R⁶, R^(7a), R^(7b), R⁸, R^(9a), R^(9b), R^(9c), R^(10a), R^(10b) and R¹¹ are independently selected a group consisting of C1-C6-alkyl, phenyl, pyridinyl, piperidinyl, piperazinyl, morpholinyl, dioxanyl, furyl and thienyl, each independendyl from another unsubstitued or mono- or di-substituted by F, Cl, Br, OCH₃, CH₂OCH₃, CH₃, CN, C₂H₅ and/or CF₃. In very specific preferred embodiments R^(4a), R^(4b), R^(5a), R^(5b), R⁶, R^(7a), R^(7b), R⁸, R^(9a), R^(9b), R^(9c), R^(10a), R^(10b) and R¹¹ are independently selected from a group consisting of methyl, ethyl, isopropyl, o-, m- or p-tolyl, o-, m- or p-methoxyphenyl, o-, m- or p-chlorophenyl, o-, m- or p-trifluormethylphenyl and o-, m- or p-cyanomethyl.

Preferably, the compounds of the present invention are selected from the group consisting of:

Compound No. 1: [(1R)-1-[3-(N-acetylanilino)propanoylamino]-2-phenyl-ethyl]boronic acid:

Compound No. 2: [(1R)-1-[3-(N-ethylsulfonylanilino)propanoylamino]-2-(p-tolyl)ethyl]boronic acid:

Compound No. 3: [(1R)-1-[3-(N-methylsulfonylanilino)propanoylamino]-2-(p-tolyl)ethyl]boronic acid:

Compound No. 4: [(1R)-1-[3-(benzenesulfonyl)propanoylamino]-2-(benzofuran-3-yl)ethyl]boronic acid:

Compound No. 5: [(1R)-1-[3-[benzenesulfonyl(ethyl)amino]propanoylamino]-2-(p-tolyl)ethyl]boronic acid:

Compound No. 6: [(1R)-1-[3-[benzenesulfonyl(isopropyl)amino]propanoylamino]-2-(p-tolyl)ethyl]boronic acid:

Compound No. 7: [(1R)-1-[3-[benzenesulfonyl(methyl)amino]propanoylamino]-2-(p-tolyl)ethyl]boronic acid:

Compound No. 8: [(1R)-1-[3-[benzoyl(ethyl)amino]propanoylamino]-2-phenyl-ethyl]boronic acid:

Compound No. 9: [(1R)-1-[3-[benzoyl(isopropyl)amino]propanoylamino]-2-phenyl-ethyl]boronic acid:

Compound No. 10: [(1R)-1-[3-[benzoyl(methyl)amino]propanoylamino]-2-phenyl-ethyl]boronic acid:

Compound No. 11: [(1R)-1-[3-[ethyl(ethylsulfonyl)amino]propanoylamino]-2-(p-tolyl)ethyl]boronic acid:

Compound No. 12: [(1R)-1-[3-[ethyl-(2-methylbenzoyl)amino]propanoylamino]-2-phenyl-ethyl]boronic acid:

Compound No. 13: [(1R)-1-[3-[ethyl-(3-methylbenzoyl)amino]propanoylamino]-2-phenyl-ethyl]boronic acid:

Compound No. 14: [(1R)-1-[3-[ethyl-(4-methylbenzoyl)amino]propanoylamino]-2-phenyl-ethyl]boronic acid:

Compound No. 15: [(1R)-1-[3-[isopropyl(methylsulfonyl)amino]propanoylamino]-2-(p-tolyl)ethyl]boronic acid:

Compound No. 16: [(1R)-1-[[2-[benzenesulfonyl(ethyl)amino]acetyl]amino]-2-(p-tolyl)ethyl]poronic acid:

Compound No. 17: [(1R)-1-[[2-[benzoyl(ethyl)amino]acetyl]amino]-2-phenyl-ethyl]boronic acid:

Compound No. 18: [(1R)-1-[[5-(dimethylamino)-5-oxo-pentanoyl]amino]-2-(3-ethylphenyl)ethyl]boronic acid:

Compound No. 19: [(1R)-2-(2,4-dimethylphenyl)-1-[3-[ethyl-(4-methylbenzoyl)amino]-propanoylamino]-ethyl]boronic acid:

Compound No. 20: [(1R)-2-(3-ethylphenyl)-1-(3-methylsulfonylpropanoylamino)ethyl]-boronic acid:

Compound No. 21: [(1R)-2-(3-ethylphenyl)-1-(4-methylsulfonylbutanoylamino)ethyl]-boronic acid:

Compound No. 22: [(1R)-2-(3-ethylphenyl)-1-(5-methylsulfonylpentanoylamino)ethyl]-boronic acid:

Compound No. 23: [(1R)-2-(benzofuran-3-yl)-1-(3-methylsulfonylpropanoylamino)ethyl]-boronic acid:

Compound No. 24: [(1R)-2-(2,4-dimethylphenyl)-1-[[2-[ethyl(propanoyl)amino]acetyl]-amino]ethyl]boronic acid

Compound No. 25: [(1R)-1-[3-[ethyl-(4-methoxybenzoyl)amino]propanoylamino]-2-(4-fluorophenyl)ethyl]boronic acid

Compound No. 26: [(1R)-1-[3-[(4-chlorobenzoyl)-ethyl-amino]propanoylamino]-2-(4-fluorophenyl)ethyl]boronic acid

Compound No. 27: [(1R)-1-[3-[ethyl-[4-(trifluoromethyl)benzoyl]amino]propanoylamino]-2-(4-fluorophenyl)ethyl]boronic acid

Compound No. 28: [(1R)-1-[3-[(4-cyanobenzoyl)-ethyl-amino]propanoylamino]-2-(4-fluorophenyl)ethyl]boronic acid

Compound No. 29: [(1R)-2-(2,4-dimethylphenyl)-1-[[2-[ethyl(o-tolylsulfonyl)amino]acetyl]-amino]ethyl]boronic acid

Compound No. 30: [(1R)-2-(2,4-dimethylphenyl)-1-[[2-[ethyl(p-tolylsulfonyl)amino]acetyl]-amino]ethyl]boronic acid

Compound No. 31: [(1R)-2-(2,4-dimethylphenyl)-1-[[2-[ethyl(m-tolylsulfonyl)amino]-acetyl]amino]ethyl]boronic acid

Compound No. 32: [(1R)-2-(2,4-dimethylphenyl)-1-[[2-[methyl(p-tolylsulfonyl)amino]-acetyl]amino]ethyl]boronic acid

Compound No. 33: [(1R)-2-(2,4-dimethylphenyl)-1-[[2-[isopropyl(p-tolylsulfonyl)amino]-acetyl]amino]ethyl]boronic acid

Compound No. 34: [(1R)-2-(2,4-dimethylphenyl)-1-[[2-(N-propanoylanilino)acetyl]amino]-ethyl]boronic acid

Compound No. 35: [(1R)-1-[[2-[N-(benzenesulfonyl)anilino]acetyl]amino]-2-(2,4-dimethylphenyl)ethyl]boronic acid

Compound No. 36: [(1R)-2-(2,4-dimethylphenyl)-1-[[2-[ethyl-(2-methylsulfanylacetyl)-amino]acetyl]amino]ethyl]boronic acid

Compound No. 37: [(1R)-1-[[2-[(2-chloroacetyl)-ethyl-amino]acetyl]amino]-2-(2,4-dimethylphenyl)ethyl]boronic acid

Compound No. 38: [(1R)-2-(benzofuran-3-yl)-1-[[3-(dimethylamino)-3-oxo-2-phenyl-propanoyl]amino]ethyl]boronic acid

Compound No. 39: [(1R)-1-[[2-(2-fluoro-N-propanoyl-anilino)acetyl]amino]-2-(3-thienyl)ethyl]boronic acid

Compound No. 40: [(1R)-1-[[2-[methyl-[2-(trifluoromethyl)benzoyl]amino]acetyl]amino]-2-(3-thienyl)ethyl]boronic acid

Compound No. 41: [(1R)-2-[(3S)-2,3-dihydrobenzofuran-3-yl]-1-[[2-[isopropyl(p-tolylsulfonyl)amino]acetyl]amino]ethyl]boronic acid

Compound No. 42: [(1R)-1-[3-[(4-chlorobenzoyl)-ethyl-amino]propanoylamino]-2-R³S)-2,3-dihydrobenzofuran-3-yl)ethyl]boronic acid

Compound No. 43: [(1R)-1-[[2-[ethyl(p-tolylsulfonyl)amino]acetyl]amino]-2-(7-methylbenzofuran-3-yl)ethyl]boronic acid

and derivatives, prodrugs, solvates, tautomers or stereoisomers thereof, as well as the physiologically acceptable salts of each of the foregoing, including mixtures thereof in all ratios

A preferred process for the synthesis of compounds of Formula (I) as defined aboveand pharmaceutically acceptable salts, tautomers and stereoisomers thereof, is characterised in that a compound of Formula (III)

is coupled with a compound of Formula (VI)

wherein all residues of formula (III) and formula (IV) are as defined above and wherein the obtained compound of Formula (Ib) is subsequently converted into a compound of Formula (Ia), by treatment with HCl, HBr, HI and/or TFA, in the presence or absence of an excess of a small molecular weight boronic acid (such as but not limited to i-BuB(OH)₂):

All residues of the compounds of formula (III) and formula (IV) are as defined above.

The following abbreviations refer to the abbreviations used below:

ACN (acetonitrile), AcOH (acetic acid), BINAP (2,2′-bis(disphenylphosphino)-1,1′-binaphthalene), dba (dibenzylidene acetone), tBu (tert-Butyl), tBuOK (potassium tert-butoxide), CDI (1,1′-Carbonyldiimidazole), DBU (1,8-dizabicyclo[5.4.0]undec-7-ene), DCC (dicyclohexylcarbodiimide), DCM (dichloromethane), DIAD (diisobutylazodicarboxylate), DIC (diisopropilcarbodiimide), DI EA (di-isopropyl ethylamine), DMA (dimethyl acetamide), DMAP (4-dimethylaminopyridine), DMSO (dimethyl sulfoxide), DMF (N,N-dimethylformamide), EDC.HCl (1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride), EtOAc (ethyl acetate), EtOH (ethanol), g (gram), cHex (cyclohexane), HATU (dimethylamino-([1,2,3]triazolo[4,5-b]pyridin-3-yloxy)-methylene]-dimethyl-ammonium hexafluorophosphate), HOBt (N-hydroxybenzotriazole), HPLC (high performance liquid chromatography), hr (hour), MHz (Megahertz), MeOH (methanol), min (minute), mL (milliliter), mmol (millimole), mM (millimolar), mp (melting point), MS (mass spectrometry), MW (microwave), NMM (N-methyl morpholine), NMR (Nuclear Magnetic Resonance), NBS (N-bromo succinimide), PBS (phosphate buffered saline), PMB (para-methoxybenzyl), PyBOP (benzotriazol-1-yl-oxytripyrrolidinophosphonium hexafluorophosphate), RT (room temperature), TBAF (tetra-butylammonium fluoride), TBTU (N,N,N′,N′-tetramethyl-O-(benzotriazol-1-yl)uronium tetrafluoroborate), T3P (propane phosphonic acid anhydride), TEA (triethyl amine), TFA (trifluoroacetic acid), THF (tetrahydrofuran), PetEther (petroleum ether), TBME (tert-butyl methyl ether), TLC (thin layer chromatography), TMS (trimethylsilyl), TMSI (trimethylsilyl iodide), UV (ultraviolet).

Generally, compounds of Formula (I), wherein all residues are defined as above, can be obtained from a compound of Formula (III) as outlined in Scheme 1.

The first step consists in the reaction of a compound of Formula (III), wherein X and LX are defined as above, with a compound of Formula (IV), wherein R¹, R², LY and Y are defined as above. The reaction is performed using conditions and methods well known to those skilled in the art for the preparation of amides from a carboxylic acid with standard coupling agents, such as but not limited to HATU, TBTU, polymer-supported 1-alkyl-2-chloropyridinium salt (polymer-supported Mukaiyama's reagent), 1-methyl-2-chloropyridinium iodide (Mukaiyama's reagent), a carbodiimide (such as DCC, DIC, EDC) and HOBt, PyBOP® and other such reagents well known to those skilled in the art, preferably TBTU, in the presence or absence of bases such as TEA, DIEA, NMM, polymer-supported morpholine, preferably DIEA, in a suitable solvent such as DCM, THF or DMF, at a temperature between −10° C. to 50° C., preferably at 0° C., for a few hours, e.g. one hour to 24 h. Alternatively, the compounds of Formula (III) could be converted to carboxylic acid derivatives such as acyl halides or anhydrides, by methods well known to those skilled in the art, such as but not limited to treatment with SOCl₂, POCl₃, PCl₅, (COCl)₂, in the presence or absence of catalytic amounts of DMF, in the presence or absence of a suitable solvent such as toluene, DCM, THF, at a temperature rising from 20° C. to 100° C., preferably at 50° C., for a few hours, e.g. one hour to 24 h. Conversion of the carboxylic acid derivatives to compounds of Formula (III), can be achieved using conditions and methods well known to those skilled in the art for the preparation of amides from a carboxylic acid derivative (e.g. acyl chloride) with alkyl amines, in the presence of bases such as TEA, DIEA, NMM in a suitable solvent such as DCM, THF or DMF, at a temperature rising from 20° C. to 100° C., preferably at 50° C., for a few hours, e.g. one hour to 24 h.

In the process described above the reaction between the compound of Formula (III) and the compound of Formula (IV) is preferably performed in the presence of a coupling agent selected from HATU, TBTU, polymer-supported 1-alkyl-2-chloropyridinium salt (polymer-supported. Mukaiyama's reagent), 1-methyl-2-chloropyridinium iodide (Mukaiyama's reagent), a carbodiimide.

Compounds of Formula (Ia), wherein LX, X, LY and Y are defined as above and wherein R¹ and R² are H, can be prepared starting from compounds of Formula (Ib), using methods well known to those skilled in the art for the hydrolysis of boronic esters, such as but not limited to treatment with HCl, HBr, HI, TFA, in the presence or absence of an excess of a small molecular weight boronic acid, such as but not limited to i-BuB(OH)₂ (Scheme 2).

Compounds of Formula (III) or (IV) are either commercially available or can be prepared by methods well known to those skilled in the art.

In general, compounds of Formular (IV) are for example accessible by the following scheme 3a:

Compounds of formula (IV-1) wherein Y is a 2,3-dihydrobenzofuran-3-yl are for example accessible by the following scheme 3b:

In this case typically both isomers at the 3 position of the 2,3-dihydrobenzofurane are formed.

Amino boronic acids of formula IV-la or IV-1b containing stereochemically pure 2,3-dihydrobenzofurane are accessible by the following scheme 4a:

Compounds of formula I-1a and I-1b wherein Y is a 2,3-dihydrobenzofuran-3-yl are for example accessible by the following scheme 5:

The chiral seperation can be performed e.g. by chiral HLPC.

Compounds of Formula (III) are for example accessible by the following schemes 6, 7, 8, 9 or 10:

If the above set of general synthetic methods is not applicable to obtain compounds according to Formula (I) and/or necessary intermediates for the synthesis of compounds of Formula (I), suitable methods of preparation known by a person skilled in the art should be used.

In general, the synthesis pathways for any individual compounds of formula (I) will depend on the specific substitutents of each molecule and upon the ready availability of Intermediates necessary; again such factors being appreciated by those of ordinary skill in the art. For all the protection and de-protection methods, see Philip J. Kocienski, in “Protecting Groups”, Georg Thieme Verlag Stuttgart, New York, 1994 and, Theodora W. Greene and Peter G. M. Wuts in “Protective Groups in Organic Synthesis”, Wiley Interscience, 3rd Edition 1999.

Compounds of this invention can be isolated in association with solvent molecules by crystallization from evaporation of an appropriate solvent. The pharmaceutically acceptable acid addition salts of the compounds of formula (I), which contain a basic center, may be prepared in a conventional manner. For example, a solution of the free base may be treated with a suitable acid, either neat or in a suitable solution, and the resulting salt isolated either by filtration or by evaporation under vacuum of the reaction solvent. Pharmaceutically acceptable base addition salts may be obtained in an analogous manner by treating a solution of compounds of formula (I), which contain an acid center, with a suitable base. Both types of salts may be formed or interconverted using ion-exchange resin techniques.

Depending on the conditions used, the reaction times are generally between a few minutes and 14 days, and the reaction temperature is between about -30° C. and 140° C., normally between −10° C. and 90° C., in particular between about 0° C. and about 70° C.

Compounds of the formula (I) can furthermore be obtained by liberating compounds of the formula (I) from one of their functional derivatives by treatment with a solvolysing or hydrogenolysing agent.

Preferred starting materials for the solvolysis or hydrogenolysis are those which conform to the formula (I), but contain corresponding protected amino and/or hydroxyl groups instead of one or more free amino and/or hydroxyl groups, preferably those which carry an amino-protecting group instead of an H atom bound to an N atom, in particular those which carry an R′—N group, in which R′ denotes an amino-protecting group, instead of an HN group, and/or those which carry a hydroxyl-protecting group instead of the H atom of a hydroxyl group, for example those which conform to the formula (I), but carry a —COOR″ group, in which R″ denotes a hydroxylprotecting group, instead of a —COON group.

It is also possible for a plurality of—identical or different—protected amino and/or hydroxyl groups to be present in the molecule of the starting material. If the protecting groups present are different from one another, they can in many cases be cleaved off selectively.

The term “amino-protecting group” is known in general terms and relates to groups which are suitable for protecting (blocking) an amino group against chemical reactions, but which are easy to remove after the desired chemical reaction has been carried out elsewhere in the molecule. Typical of such groups are, in particular, unsubstituted or substituted acyl, aryl, aralkoxymethyl or aralkyl groups. Since the amino-protecting groups are removed after the desired reaction (or reaction sequence), their type and size are furthermore not crucial; however, preference is given to those having 1-20, in particular 1-8, carbon atoms. The term “acyl group” is to be understood in the broadest sense in connection with the present process. It includes acyl groups derived from aliphatic, araliphatic, aromatic or heterocyclic carboxylic acids or sulfonic acids, and, in particular, alkoxy-carbonyl, aryloxycarbonyl and especially aralkoxycarbonyl groups. Examples of such acyl groups are alkanoyl, such as acetyl, propionyl and butyryl; aralkanoyl, such as phenylacetyl; aroyl, such as benzoyl and tolyl; aryloxyalkanoyl, such as POA; alkoxycarbonyl, such as methoxy-carbonyl, ethoxycarbonyl, 2,2,2-trichloroethoxycarbonyl, BOC (tert-butoxy-carbonyl) and 2-iodoethoxycarbonyl; aralkoxycarbonyl, such as CBZ (“carbo-benz-oxy”), 4-methoxybenzyloxycarbonyl and FMOC; and aryl-sulfonyl, such as Mtr. Preferred amino-protecting groups are BOC and Mtr, furthermore CBZ, Fmoc, benzyl and acetyl.

The term “hydroxyl-protecting group” is likewise known in general terms and relates to groups which are suitable for protecting a hydroxyl group against chemical reactions, but are easy to remove after the desired chemical reaction has been carried out elsewhere in the molecule. Typical of such groups are the above-mentioned unsubstituted or substituted aryl, aralkyl or acyl groups, furthermore also alkyl groups. The nature and size of the hydroxyl-protecting groups are not crucial since they are removed again after the desired chemical reaction or reaction sequence; preference is given to groups having 1-20, in particular 1-10, carbon atoms. Examples of hydroxyl-protecting groups are, inter alia, benzyl, 4-methoxybenzyl, p-nitro-benzoyl, p-toluenesulfonyl, tert-butyl and acetyl, where benzyl and tert-butyl are particu-larly preferred.

The term “solvates of the compounds” is taken to mean adductions of inert solvent molecules onto the compounds which form owing to their mutual attractive force. Solvates are, for example, mono- or dihydrates or alcoholates.

The compounds of the formula (I) are liberated from their functional derivatives—depending on the protecting group used—for example using strong acids, advantageously using TFA or perchloric acid, but also using other strong inorganic acids, such as hydrochloric acid or sulfuric acid, strong organic carboxylic acids, such as trichloroacetic acid, or sulfonic acids, such as benzene- or p-toluenesulfonic acid. The presence of an additional inert solvent is possible, but is not always necessary. Suitable inert solvents are preferably organic, for example carboxylic acids, such as acetic acid, ethers, such as THF or dioxane, amides, such as DMF, halogenated hydrocarbons, such as DCM, furthermore also alcohols, such as methanol, ethanol or isopropanol, and water. Mixtures of the above-mentioned solvents are furthermore suitable. TFA is preferably used in excess without addition of a further solvent, and perchloric acid is preferably used in the form of a mixture of acetic acid and 70% perchloric acid in the ratio 9:1. The reaction temperatures for the cleavage are advantageously between about 0 and about 50° C., preferably between 15 and 30° C. (RT).

The BOC, OBut and Mtr groups can, for example, preferably be cleaved off using TFA in DCM or using approximately 3 to 5N HCl in dioxane at 15-30° C., and the FMOC group can be cleaved off using an approximately 5 to 50% solution of dimethylamine, diethylamine or piperidine in DMF at 15-30° C.

Protecting groups which can be removed hydrogenolytically (for example CBZ, benzyl or the liberation of the amidino group from the oxadiazole derivative thereof) can be cleaved off, for example, by treatment with hydrogen in the presence of a catalyst (for example a noble-metal catalyst, such as palladium, advantageously on a support, such as carbon). Suitable solvents here are those indicated above, in particular, for example, alcohols, such as methanol or ethanol, or amides, such as DMF. The hydrogenolysis is generally carried out at temperatures between about 0 and 100° C. and pressures between about 1 and 200 bar, preferably at 20-30° C. and 1-10 bar. Hydrogenolysis of the CBZ group succeeds well, for example, on 5 to 10% Pd/C in methanol or using ammonium formate (instead of hydrogen) on Pd/C in methanol/DMF at 20-30° C.

Examples of suitable inert solvents are hydrocarbons, such as hexane, petroleum ether, benzene, toluene or xylene; chlorinated hydrocarbons, such as trichloroethylene, 1,2-dichloroethane, tetrachloromethane, tri-fluoro-methylbenzene, chloroform or DCM;

alcohols, such as methanol, ethanol, isopropanol, n-propanol, n-butanol or tert-butanol; ethers, such as diethyl ether, diisopropyl ether, tetrahydrofurane (THF) or dioxane; glycol ethers, such as ethylene glycol monomethyl or monoethyl ether or ethylene glycol dimethyl ether (diglyme); ketones, such as acetone or butanone; amides, such as acetamide, dimethylacetamide, N-methylpyrrolidone (NMP) or dimethyl-formamide (DMF); nitriles, such as acetonitrile; sulfoxides, such as dimethyl sulfoxide (DMSO); carbon disulfide; carboxylic acids, such as formic acid or acetic acid; nitro compounds, such as nitromethane or nitrobenzene; esters, such as EtOAc, or mixtures of the said solvents.

Esters can be saponified, for example, using LiOH, NaOH or KOH in water, water/THF, water/THF/ethanol or water/dioxane, at temperatures between 0 and 100° C. Furthermore, ester can be hydrolysed, for example, using acetic acid, TFA or HCL.

Free amino groups can furthermore be acylated in a conventional manner using an acyl chloride or anhydride or alkylated using an unsubstituted or substituted alkyl halide or reacted with CH₃—C(═NH)—OEt, advantageously in an inert solvent, such as DCM or THF and/or in the presence of a base, such as triethylamine or pyridine, at temperatures between −60° C. and +30° C.

Throughout the specification, the term leaving group preferably denotes Cl, Br, I or a reactively modified OH group, such as, for example, an activated ester, an imidazolide or alkylsulfonyloxy having 1 6 carbon atoms (preferably methylsulfonyloxy or trifluoromethylsulfonyloxy) or arylsulfonyloxy having 6 10 carbon atoms (preferably phenyl- or p tolylsulfonyloxy).

Radicals of this type for activation of the carboxyl group in typical acylation reactions are described in the literature (for example in the standard works, such as Houben-Weyl, Methoden der organischen Chemie [Meth¬ods of Organic Chemistry], Georg-Thieme-Verlag, Stuttgart).

Activated esters are advantageously formed in situ, for example through addition of HOBt or N hydroxysuccinimide.

The term “pharmaceutically usable derivatives” is taken to mean, for example, the salts of the compounds of the formula I and so-called prodrug compounds.

The term “prodrug derivatives” is taken to mean compounds of the formula I which have been modified with, for example, alkyl or acyl groups, sugars or oligopeptides and which are rapidly cleaved in the organism to form the active compounds.

These also include biodegradable polymer derivatives of the compounds according to the invention, as described, for example, in Int. J. Pharm. 115, 61-67 (1995).

The present invention relates to a process for making the compounds according to Formula (I) and related Formulae.

The present invention relates to pharmaceutical compositions comprising at least one compound of formula (I) wherein all residues are as defined above, or its derivatives, prodrugs, solvates, tautomers or stereoisomers thereof as well as the physiologically acceptable salts of each of the foregoing, including mixtures thereof in all ratios, as active ingredient, together with a pharmaceutically acceptable carrier.

For the purpose of the present invention the term “pharmaceutical composition” refers to a composition or product comprising one or more active ingredients, and one or more inert ingredients that make up the carrier, as well as any product which results, directly or indirectly, from combination, complexation or aggregation of any two or more of the ingredients, or from dissociation of one or more of the ingredients, or from other types of reactions or interactions of one or more of the ingredients. Accordingly, the pharmaceutical compositions of the present invention encompass any composition made by admixing at least one compound of the present invention and a pharmaceutically acceptable carrier, excipient or vehicle. The pharmaceutical compositions of the present invention also encompass any composition that further comprises a second active ingredient or its derivatives, prodrugs, solvates, tautomers or stereoisomers thereof as well as the physiologically acceptable salts of each of the foregoing, including mixtures thereof in all ratios, wherein that second active ingredient is other than a compound of formula (I) wherein all residues are defined above.

The invention relates to compounds according to formula (I) or any specific embodiment described above and pharmaceutically usable salts, tautomers, solvates and stereoisomers thereof, including mixtures thereof in all ratios, for use in the treatment and/or prophylaxis (prevention) of an immunoregulatory abnomality or hematological malignancies.

For the purpose of the present invention immunoregulatory abnormality is an autoimmune or chronic inflammatory disease selected from the group consisting of: systemic lupus erythematosis, chronic rheumatoid arthritis, inflammatory bowel disease, multiple sclerosis, amyotrophic lateral sclerosis (ALS), atherosclerosis, scleroderma, autoimmune hepatitis, Sjogren Syndrome, lupus nephritis, glomerulonephritis, Rheumatoid Arthritis, Psoriasis, Myasthenia Gravis, Imunoglobuline A nephropathy, Vasculitis, Transplant rejection, Myositis, Henoch-Schönlein Purpura and asthma and the hematological malignancy is a disease selected from the group consisting of: Multiple myeloma, chronic lymphoid leukemia, acute myeloid leukemia, mantle cell lymphoma.

The invention relates to compounds according to formula (I) or any specific embodiment described above and its derivatives, prodrugs, solvates, tautomers or stereoisomers thereof as well as the physiologically acceptable salts of each of the foregoing, including mixtures thereof in all ratios, for use in the prevention and/or treatment of medical conditions that are affected by inhibiting LMP7. The also invention relates to compounds according to formula (I) or any specific embodiment described above and its derivatives, prodrugs, solvates, tautomers or stereoisomers thereof as well as the physiologically acceptable salts of each of the foregoing, including mixtures thereof in all ratios, for use in the prevention and/or treatment of an immunoregulatory abnomality or hematological malignancies. In particular in such cases where the immunoregulatory abnomality selected from Amyotrophic Lateral Sclerosis, Sjogren Syndrome, systemic lupus erythematoses, lupus nephritis, glomerulonephritis, Rheumatoid Arthritis, Inflammatory bowel disease, ulcerative colitis, crohn's diseases, multiple sclerosis, Amyotrophic lateral sclerosis, osteoarthritis, Atherosclerosis, Psoriasis, Myasthenia Gravis, Dermal fibrosis, renal fibrosis, cardiac fibrosis, Liver fibrosis, Lung fibrosis, Imunoglobuline A nephropathy, Vasculitis, Transplant rejection, Hematological malignancies and asthma.

The pharmaceutical preparations can be employed as medicaments in human and veterinary medicine.

The present invention further relates to a set (kit) consisting of separate packs of

-   -   (a) an effective amount of a compound of the formula (I) and/or         pharmaceutically acceptable salts, tautomers and stereoisomers         thereof, including mixtures thereof in all ratios, and     -   (b) an effective amount of a further medicament active         ingredient.

Pharmaceutical salts and other forms

The said compounds of the formula (I) can be used in their final non-salt form. On the other hand, the present invention also relates to the use of these compounds in the form of their pharmaceutically acceptable salts, which can be derived from various organic and inorganic acids and bases by procedures known in the art. Pharmaceutically acceptable salt forms of the compounds of the formula I are for the most part prepared by conventional methods. If the compound of the formula I contains an acidic center, such as a carboxyl group, one of its suitable salts can be formed by reacting the compound with a suitable base to give the corresponding base-addition salt. Such bases are, for example, alkali metal hydroxides, including potassium hydroxide and sodium hydroxide; alkaline earth metal hydroxides, such as magnesium hydroxide and calcium hydroxide; and various organic bases, such as piperidine, diethanolamine and N-methyl-glucamine (meglumine), benzathine, choline, diethanolamine, ethylenediamine, benethamine, diethylamine, piperazine, lysine, L-arginine, ammonia, triethanolamine, betaine, ethanolamine, morpholine and tromethamine. In the case of certain compounds of the formula I, which contain a basic center, acid-addition salts can be formed by treating these compounds with pharmaceutically acceptable organic and inorganic acids, for example hydrogen halides, such as hydrogen chloride or hydrogen bromide, other mineral acids and corresponding salts thereof, such as sulfate, nitrate or phosphate and the like, and alkyl- and monoaryl-sulfonates, such as methanesulfonate, ethanesulfonate, toluenesulfonate and benzene-sulfonate, and other organic acids and corresponding salts thereof, such as carbonate, acetate, trifluoro-acetate, tartrate, maleate, succinate, citrate, benzoate, salicylate, ascorbate and the like. Accordingly, pharmaceutically acceptable acid-addition salts of the compounds of the formula I include the following: acetate, adipate, alginate, aspartate, benzoate, benzene-sulfonate (besylate), bisulfate, bisulfite, bromide, camphorate, camphor-sulfonate, caprate, caprylate, chloride, chlorobenzoate, citrate, cyclamate, cinnamate, digluconate, dihydrogen-phosphate, dinitrobenzoate, dodecyl-sulfate, ethanesulfonate, formate, glycolate, fumarate, galacterate (from mucic acid), galacturonate, glucoheptanoate, gluco-nate, glutamate, glycerophosphate, hemi-succinate, hemisulfate, heptanoate, hexanoate, hippurate, hydro-chloride, hydrobromide, hydroiodide, 2-hydroxy-ethane-sulfonate, iodide, isethionate, isobutyrate, lactate, lactobionate, malate, maleate, malonate, mandelate, metaphosphate, methanesulfonate, methylbenzoate, mono-hydrogen-phosphate, 2-naphthalenesulfonate, nicotinate, nitrate, oxalate, oleate, palmo-ate, pectinate, persulfate, phenylacetate, 3-phenylpropionate, phosphate, phosphonate, phthalate, but this does not represent a restriction. Both types of salts may be formed or interconverted preferably using ion-exchange resin techniques.

Furthermore, the base salts of the compounds of the formula I include aluminium, ammonium, calcium, copper, iron (III), iron(II), lithium, magnesium, manganese(III), manganese(II), potassium, sodium and zink salts, but this is not intended to represent a restriction. Of the above-mentioned salts, preference is given to ammonium; the alkali metal salts sodium and potassium, and the alkaline earth metal salts calcium and magnesium. Salts of the compounds of the formula I which are derived from pharmaceutically acceptable organic non-toxic bases include salts of primary, secondary and tertiary amines, substituted amines, also including naturally occurring substituted amines, cyclic amines, and basic ion exchanger resins, for example arginine, betaine, caffeine, chloroprocaine, choline, N,N′-dibenzyl-ethylen-ediamine (benzathine), dicyclohexylamine, diethanol-amine, diethyl-amine, 2-diethyl-amino-ethanol, 2-dimethyl-amino-ethanol, ethanolamine, ethylenediamine, N-ethylmorpholine, N-ethyl-piperidine, glucamine, glucosamine, histidine, hydrabamine, isopropyl-amine, lido-caine, lysine, meglumine (N-methyl-D-glucamine), morpholine, piperazine, piperidine, polyamine resins, procaine, purines, theobromine, triethanol-amine, triethylamine, trimethylamine, tripropyl-amine and tris(hydroxy-methyl)-methylamine (tromethamine), but this is not intended to represent a restriction.

Compounds of the formula I of the present invention which contain basic N2-containing groups can be quaternised using agents such as (C1-C4)-alkyl halides, for example methyl, ethyl, isopropyl and tert-butyl chloride, bromide and iodide; di(C1-C4)alkyl sulfates, for example dimethyl, diethyl and diamyl sulfate; (C10-C18)alkyl halides, for example decyl, do-decyl, lauryl, myristyl and stearyl chloride, bromide and iodide; and aryl-(C1-C4)alkyl halides, for example benzyl chloride and phenethyl bromide. Both water- and oil-soluble compounds of the formula I can be prepared using such salts.

The above-mentioned pharmaceutical salts which are preferred include acetate, trifluoroacetate, besylate, citrate, fumarate, gluconate, hemisuccinate, hippurate, hydrochloride, hydrobromide, isethionate, mandelate, me-glumine, nitrate, oleate, phosphonate, pivalate, sodium phosphate, stearate, sulfate, sulfosalicylate, tartrate, thiomalate, tosylate and tro-meth-amine, but this is not intended to represent a restriction.

The acid-addition salts of basic compounds of the formula (I) are prepared by bringing the free base form into contact with a sufficient amount of the desired acid, causing the formation of the salt in a conventional manner. The free base can be regenerated by bringing the salt form into contact with a base and isolating the free base in a conventional manner. The free base forms differ in a certain respect from the corresponding salt forms thereof with respect to certain physical properties, such as solubility in polar solvents; for the purposes of the invention, however, the salts other-wise correspond to the respective free base forms thereof.

As mentioned, the pharmaceutically acceptable base-addition salts of the compounds of the formula I are formed with metals or amines, such as alkali metals and alkaline earth metals or organic amines. Preferred metals are sodium, potassium, magnesium and calcium. Preferred organic amines are N,N′-dibenzylethylenediamine, chloroprocaine, choline, diethanol-amine, ethylenediamine, N-methyl-D-glucamine and procaine.

The base-addition salts of acidic compounds of the formula I are prepared by bringing the free acid form into contact with a sufficient amount of the desired base, causing the formation of the salt in a conventional manner. The free acid can be regenerated by bringing the salt form into contact with an acid and isolating the free acid in a conventional manner. The free acid forms differ in a certain respect from the corresponding salt forms thereof with respect to certain physical properties, such as solubility in polar solvents; for the purposes of the invention, however, the salts other-wise correspond to the respective free acid forms thereof.

If a compound of the formula (I) contains more than one group which is capable of forming pharmaceutically acceptable salts of this type, the formula I also encompasses multiple salts. Typical multiple salt forms include, for example, bitartrate, diacetate, difumarate, dimeglumine, di-phosphate, disodium and trihydrochloride, but this is not intended to represent a restriction.

With regard to that stated above, it can be seen that the term “pharmaceutically acceptable salt” in the present connection is taken to mean an active ingredient which comprises a compound of the formula I in the form of one of its salts, in particular if this salt form imparts improved pharmacokinetic properties on the active ingredient compared with the free form of the active ingredient or any other salt form of the active ingredient used earlier. The pharmaceutically acceptable salt form of the active ingredient can also provide this active ingredient for the first time with a desired pharmacokinetic property which it did not have earlier and can even have a positive influence on the pharmacodynamics of this active ingredient with respect to its therapeutic efficacy in the body.

Owing to their molecular structure, the compounds of the formula (I) can be chiral and can accordingly occur in various enantiomeric forms. They can therefore exist in racemic or in optically active form.

Since the pharmaceutical activity of the racemates or stereoisomers of the compounds according to the invention may differ, it may be desirable to use the enantiomers. In these cases, the end product or even the Intermediates can be separated into enantiomeric compounds by chemical or physical measures known to the person skilled in the art or even employed as such in the synthesis.

In the case of racemic amines, diastereomers are formed from the mixture by reaction with an optically active resolving agent. Examples of suitable resolving agents are optically active acids, such as the (R) and (S) forms of tartaric acid, diacetyltartaric acid, dibenzoyltartaric acid, mandelic acid, malic acid, lactic acid, suitable N-protected amino acids (for example N-benzoylproline or N-benzenesulfonylproline), or the various optically active camphorsulfonic acids. Also advantageous is chromatographic enantiomer resolution with the aid of an optically active resolving agent (for example dinitrobenzoylphenylglycine, cellulose triacetate or other derivatives of carbohydrates or chirally derivatised methacrylate polymers immobilised on silica gel). Suitable eluents for this purpose are aqueous or alcoholic solvent mixtures, such as, for example, hexane/isopropanol/ acetonitrile, for example in the ratio 82:15:3.

The invention furthermore relates to the use of compounds of formula I, and related formulae in combination with at least one further medicament active ingredient, preferably medicaments used in the treatment of multiple sclerosis such as cladribine or another co-agent, such as interferon, e.g. pegylated or non-pegylated interferons, preferably interferon beta and/or with compounds improving vascular function or in combination with immunomodulating agents for example Fingolimod; cyclosporins, rapamycins or ascomycins, or their immunosuppressive analogs, e.g. cyclosporin A, cyclosporin G, FK-506, ABT-281, ASM981, rapamycin, 40-O-(2-hydroxy)ethyl-rapamycin etc.; corticosteroids; cyclophosphamide; azathioprene; methotrexate; leflunomide; mizoribine; mycophenolic add; mycophenolate mofetil; 15-deoxyspergualine; diflucortolone valerate; difluprednate; Alclometasone dipropionate; amcinonide; amsacrine; asparaginase; azathioprine; basiliximab; beclometasone dipropionate; betamethasone; betamethasone acetate; betamethasone dipropionate; betamethasone phosphate sodique; betamethasone valerate; budesonide; captopril; chlormethine chlorhydrate; cladribine; clobetasol propionate; cortisone acetate; cortivazol; cyclophosphamide; cytarabine; daclizumab; dactinomycine; desonide; desoximetasone; dexamethasone; dexamethasone acetate; dexamethasone isonicotinate; dexamethasone metasulfobenzoate sodique; dexamethasone phosphate; dexamethasone tebutate;dichlorisone acetate; doxorubicine chlorhydrate; epirubicine chlorhydrate; fluclorolone acetonide; fludrocortisone acetate; fludroxycortide; flumetasone pivalate; flunisolide; fluocinolone acetonide; fluocinonide; fluocortolone; fluocortolone hexanoate; fluocortolone pivalate; fluorometholone; fluprednidene acetate; fluticasone propionate; gemcitabine chlorhydrate; halcinonide; hydrocortisone, hydrocortisone acetate, hydrocortisone butyrate, hydrocortisone hemisuccinate; melphalan; meprednisone; mercaptopurine; methylprednisolone; methylprednisolone acetate; methylprednisolone hemisuccinate; misoprostol; muromonab-cd3; mycophenolate mofetil; paramethasone acetate; prednazoline, prednisolone; prednisolone acetate; prednisolone caproate; prednisolone metasulfobenzoate sodique; prednisolone phosphate sodique; prednisone; prednylidene; rifampicine; rifampicine sodique; tacrolimus; teriflunomide; thalidomide; thiotepa; tixocortol pivalate; triamcinolone; triamcinolone acetonide hemisuccinate; triamcinolone benetonide; triamcinolone diacetate; triamcinolone hexacetonide; immunosuppressive monoclonal antibodies, e.g., monoclonal antibodies to leukocyte receptors, e.g., MHC, CD2, CD3, CD4, CD7, CD25, CD28, B7, CD40, CD45 or CD58 or their ligands; or other immunomodulatory compounds, e.g. CTLA41 g, or other adhesion molecule inhibitors, e.g. mAbs or low molecular weight inhibitors including Selectin antagonists and VLA-4 antagonists. A preferred composition is with Cyclosporin A, FK506, rapamycin or 40-(2-hydroxy)ethyl-rapamycin and Fingolimod. These further medicaments, such as interferon beta, may be administered concomitantly or sequentially, e.g. by subcutaneous, intramuscular or oral routes.

These compositions can be used as medicaments in human and veterinary medicine.

Pharmaceutical formulations can be administered in the form of dosage units, which comprise a predetermined amount of active ingredient per dosage unit. Such a unit can comprise, for example, 0.5 mg to 1 g, preferably 1 mg to 700 mg, particularly preferably 5 mg to 100 mg, of a compound according to the invention, depending on the disease condition treated, the method of administration and the age, weight and condition of the patient, or pharmaceutical formulations can be administered in the form of dosage units which comprise a predetermined amount of active ingredient per dosage unit. Preferred dosage unit formulations are those which comprise a daily dose or part-dose, as indicated above, or a corresponding fraction thereof of an active ingredient. Furthermore, pharmaceutical formulations of this type can be prepared using a process, which is generally known in the pharmaceutical art.

Pharmaceutical formulations can be adapted for administration via any desired suitable method, for example by oral (including buccal or sublingual), rectal, nasal, topical (including buccal, sublingual or transdermal), vaginal or parenteral (including subcutaneous, intramuscular, intravenous or intradermal) methods. Such formulations can be prepared using all processes known in the pharmaceutical art by, for example, combining the active ingredient with the excipient(s) or adjuvant(s).

Pharmaceutical formulations adapted for oral administration can be administered as separate units, such as, for example, capsules or tablets; powders or granules; solutions or suspensions in aqueous or non-aqueous liquids; edible foams or foam foods; or oil-in-water liquid emulsions or water-in-oil liquid emulsions.

Thus, for example, in the case of oral administration in the form of a tablet or capsule, the active-ingredient component can be combined with an oral, non-toxic and pharmaceutically acceptable inert excipient, such as, for example, ethanol, glycerol, water and the like. Powders are prepared by comminuting the compound to a suitable fine size and mixing it with a pharmaceutical excipient comminuted in a similar manner, such as, for example, an edible carbohydrate, such as, for example, starch or mannitol. A flavour, preservative, dispersant and dye may likewise be present.

Capsules are produced by preparing a powder mixture as described above and filling shaped gelatine shells therewith. Glidants and lubricants, such as, for example, highly disperse silicic acid, talc, magnesium stearate, calcium stearate or polyethylene glycol in solid form, can be added to the powder mixture before the filling operation. A disintegrant or solubiliser, such as, for example, agar-agar, calcium carbonate or sodium carbonate, may likewise be added in order to improve the availability of the medica-ment after the capsule has been taken.

In addition, if desired or necessary, suitable binders, lubricants and disintegrants as well as dyes can likewise be incorporated into the mixture. Suitable binders include starch, gelatine, natural sugars, such as, for example, glucose or beta-lactose, sweeteners made from maize, natural and synthetic rubber, such as, for example, acacia, tragacanth or sodium alginate, carboxymethylcellulose, polyethylene glycol, waxes, and the like. The lubricants used in these dosage forms include sodium oleate, sodium stearate, magnesium stearate, sodium benzoate, sodium acetate, sodium chloride and the like. The disintegrants include, without being restricted thereto, starch, methylcellulose, agar, bentonite, xanthan gum and the like. The tablets are formulated by, for example, preparing a powder mixture, granulating or dry-pressing the mixture, adding a lubricant and a disintegrant and pressing the entire mixture to give tablets. A powder mixture is prepared by mixing the compound comminuted in a suitable manner with a diluent or a base, as described above, and optionally with a binder, such as, for example, carboxymethylcellulose, an alginate, gelatine or polyvinyl-pyrrolidone, a dissolution retardant, such as, for example, paraffin, an absorption accelerator, such as, for example, a quaternary salt, and/or an absorbant, such as, for example, bentonite, kaolin or dicalcium phosphate. The powder mixture can be granulated by wetting it with a binder, such as, for example, syrup, starch paste, acadia mucilage or solutions of cellulose or polymer materials and pressing it through a sieve. As an alternative to granulation, the powder mixture can be run through a tableting machine, giving lumps of non-uniform shape which are broken up to form granules. The granules can be lubricated by addition of stearic acid, a stearate salt, talc or mineral oil in order to prevent sticking to the tablet casting moulds. The lubricated mixture is then pressed to give tablets. The active ingredients can also be combined with a free-flowing inert excipient and then pressed directly to give tablets without carrying out the granulation or dry-pressing steps. A transparent or opaque protective layer consisting of a shellac sealing layer, a layer of sugar or polymer material and a gloss layer of wax may be present. Dyes can be added to these coatings in order to be able to differentiate between different dosage units.

Oral liquids, such as, for example, solution, syrups and elixirs, can be prepared in the form of dosage units so that a given quantity comprises a pre-specified amount of the compounds. Syrups can be prepared by dissolving the compounds in an aqueous solution with a suitable flavour, while elixirs are prepared using a non-toxic alcoholic vehicle. Suspensions can be for-mulated by dispersion of the compounds in a non-toxic vehicle. Solubilisers and emulsifiers, such as, for example, ethoxylated isostearyl alcohols and polyoxyethylene sorbitol ethers, preservatives, flavour additives, such as, for example, peppermint oil or natural sweeteners or saccharin, or other artificial sweeteners and the like, can likewise be added.

The dosage unit formulations for oral administration can, if desired, be encapsulated in microcapsules. The formulation can also be prepared in such a way that the release is extended or retarded, such as, for example, by coating or embedding of particulate material in polymers, wax and the like.

The compounds of the formula (I) and salts, solvates and physiologically functional derivatives thereof and the other active ingredients can also be administered in the form of liposome delivery systems, such as, for exam-ple, small unilamellar vesicles, large unilamellar vesicles and multilamellar vesicles. Liposomes can be formed from various phospholipids, such as, for example, cholesterol, stearylamine or phosphatidylcholines.

The compounds of the formula (I) and the salts, solvates and physiologically functional derivatives thereof and the other active ingredients can also be delivered using monoclonal antibodies as individual carriers to which the compound molecules are coupled. The compounds can also be coupled to soluble polymers as targeted medicament carriers. Such polymers may encompass polyvinylpyrrolidone, pyran copolymer, polyhydroxypropyl-methacrylamidophenol, polyhydroxyethylaspartamidophenol or polyethylene oxide polylysine, substituted by palmitoyl radicals. The compounds may furthermore be coupled to a class of biodegradable polymers which are suitable for achieving controlled release of a medicament, for example polylactic acid, poly-epsilon-caprolactone, polyhydroxybutyric acid, poly-orthoesters, polyacetals, polydihydroxypyrans, polycyanoacrylates and crosslinked or amphipathic block copolymers of hydrogels.

Pharmaceutical formulations adapted for transdermal administration can be administered as independent plasters for extended, close contact with the epidermis of the recipient. Thus, for example, the active ingredient can be delivered from the plaster by iontophoresis, as described in general terms in Pharmaceutical Research, 3(6), 318 (1986).

Pharmaceutical compounds adapted for topical administration can be formulated as ointments, creams, suspensions, lotions, powders, solutions, pastes, gels, sprays, aerosols or oils.

For the treatment of the eye or other external tissue, for example mouth and skin, the formulations are preferably applied as topical ointment or cream. In the case of formulation to give an ointment, the active ingredient can be employed either with a paraffinic or a water-miscible cream base. Alternatively, the active ingredient can be formulated to give a cream with an oil-in-water cream base or a water-in-oil base.

Pharmaceutical formulations adapted for topical application to the eye include eye drops, in which the active ingredient is dissolved or sus-pended in a suitable carrier, in particular an aqueous solvent.

Pharmaceutical formulations adapted for topical application in the mouth encompass lozenges, pastilles and mouthwashes.

Pharmaceutical formulations adapted for rectal administration can be administered in the form of suppositories or enemas.

Pharmaceutical formulations adapted for nasal administration in which the carrier substance is a solid comprise a coarse powder having a particle size, for example, in the range 20-500 microns, which is administered in the manner in which snuff is taken, i.e. by rapid inhalation via the nasal passages from a container containing the powder held close to the nose. Suitable formulations for administration as nasal spray or nose drops with a liquid as carrier substance encompass active-ingredient solutions in water or oil.

Pharmaceutical formulations adapted for administration by inhalation encompass finely particulate dusts or mists, which can be generated by various types of pressurised dispensers with aerosols, nebulisers or insuf-flators.

Pharmaceutical formulations adapted for vaginal administration can be administered as pessaries, tampons, creams, gels, pastes, foams or spray formulations.

Pharmaceutical formulations adapted for parenteral administration include aqueous and non-aqueous sterile injection solutions comprising antioxidants, buffers, bacteriostatics and solutes, by means of which the formulation is rendered isotonic with the blood of the recipient to be treated; and aqueous and non-aqueous sterile suspensions, which may comprise suspension media and thickeners. The formulations can be administered in single-dose or multidose containers, for example sealed ampoules and vials, and stored in freeze-dried (lyophilised) state, so that only the addition of the sterile carrier liquid, for example water for injection purposes, immediately before use is necessary.

Injection solutions and suspensions prepared in accordance with the recipe can be prepared from sterile powders, granules and tablets.

It goes without saying that, in addition to the above particularly mentioned constituents, the formulations may also comprise other agents usual in the art with respect to the particular type of formulation; thus, for example, formulations which are suitable for oral administration may comprise flavours.

A therapeutically effective amount of a compound of the formula I and of the other active ingredient depends on a number of factors, including, for example, the age and weight of the animal, the precise disease condition which requires treatment, and its severity, the nature of the formulation and the method of administration, and is ultimately determined by the treating doctor or vet. However, an effective amount of a compound is generally in the range from 0.1 to 100 mg/kg of body weight of the recipient (mammal) per day and particularly typically in the range from 1 to 10 mg/kg of body weight per day. Thus, the actual amount per day for an adult mammal weighing 70 kg is usually between 70 and 700 mg, where this amount can be administered as an individual dose per day or usually in a series of part-doses (such as, for example, two, three, four, five or six) per day, so that the total daily dose is the same. An effective amount of a salt or solvate or of a physiologically functional derivative thereof can be determined as the fraction of the effective amount of the compound per se.

The present invention furthermore relates to a method for treating a subject suffering from a sphingosine 1-phosphate associated disorder, comprising administering to said subject an effective amount of a compounds of formula (I). The present invention preferably relates to a method, wherein the sphingosine 1-phosphate-1 associated disorder is an autoimmune disorder or condition associated with an overactive immune response.

The present invention furthermore relates to a method of treating a subject suffering from an immunerogulatory abnomality or hematological malignancies, comprising administering to said subject a compounds of formula (I) in an amount that is effective for treating said immunoregulatory abnormality or hematological malignancies.The present invention preferably relates to a method wherein the immunoregulatory abnormality is an autoimmune or chronic inflammatory disease.

EXAMPLES

¹HNMR:

Bruker 400 MHz

HPLC:

Method A

Method: A: 0.1% TFA in H₂O, B: 0.1% TFA in ACN: Flow 2.0 mL/min; Gradient: 0 min 5% B, 8.0 min: 100% B, 8.1 min: 100% B, 8.5 min: 5% B, 10.0 min: 5% B. Column: XBridge C8 (50×4.6 mm, 3.5 μm).

Method B

Method: 10 min, A: 0.05% TFA in H₂O, B: 0.04% TFA in ACN: Flow 2 mL/min; 215 nm; Gradient: 0-0.2 min 5% B, 0.2-8.5 min: 5%-100% B, 8.5-10.0 min: 99%-5% B. Column: XBridge C8 (502×4.6 mm, 3.5 μm)

Intermediate 1a: [(1R)-1-amino-2-(3-ethylbenzyl)boronicacid (+)-pinanediolester trifluoroacetate

Step 1: (3-ethylphenyl)methanol

To a solution of 3-bromobenzylalcohol (10.00 g; 52.40 mmol; 1.00 eq.) in THF (50.00 ml) taken in a pressure tube were added Cesium carbonate (51.73 g; 157.19 mmol; 3.00 eq.), Triethyl-borane (1.0 M in THF) (157.19 ml; 157.19 mmol; 3.00 eq.) and 1,1′-Bis(diphenylphosphino)ferrocene]dichloropalladium(II) (0.79 g; 1.05 mmol; 0.02 eq.). The contents were heated at 70° C. for 5 h. TLC showed completion of reaction. The reaction mixture was cooled with ice and quenched with 100 mL of 10% NaOH solution, 20 mL of 30% H₂O₂ solution (added dropwise). The reaction mixture was further stirred at RT for 30 minutes. The reaction mixture was cooled again, neutralized with conc. HCl and extracted with methyltertiarybutylether (MTBE). The organic layer was dried over Na₂SO₄ and concentrated. The crude was purified by column chromatography using 8% ethylacetate and petroleum ether to afford 3-Ethyl-phenyl)-methanol (7.00 g; 46.00 mmol; 87.8%; pale yellow liquid; Purified Product).

¹H NMR (400 MHz, CDCl₃): δ 7.32-7.28 (m, 1H), 7.23-7.13 (m, 3H), 4.97 (s, 1H), 4.69 (s, 2H), 2.71-2.63 (m, 2H), 1.28-1.23 (m, 3H)

Step 2: 1-(bromomethyl)-3-ethylbenzene

A cold (0° C.) solution of (3-ethylphenyl) methanol (7.0 g, 46.0 mmol) in diethyl ether (70 mL) was treated with phosphorus tribromide (1.4 mL, 15.2 mmol) and the reaction mixture was stirred at 0° C. for 30 min. The reaction mixture was then poured into ice and extracted with ether. The organic layer was dried over sodium sulfate and concentrated. The crude product (9.1 g, colorless liquid, 70.7%) was taken as such for next step without purification.

¹H NMR (400 MHz, CDCl₃): δ 7.29-7.21 (m, 3H), 7.16-7.14 (m, 1H), 4.50 (s, 2H), 2.69-2.64 (m, 2H), 1.28-1.24 (m, 3H)

Step 3: 2-(3-ethylbenzyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane

A solution of 1-(bromomethyl)-3-ethylbenzene (9.1 g, 32.5 mmol) in degassed 1,4-dioxane (90 ml) was treated with bis(pinacolato)diboron (10.0 g, 39.0 mmol, potassium carbonate (13.6 g, 97.5 mmol, tetrakis(triphenylphosphine) palladium(0) (1.9 g, 1.6 mmol) and the mixture heated at 100° C. for 12h The contents of the flask were cooled to room temperature and filtered through a celite bed. Filtrate was concentrated and the residue was dissolved in ethylacetate and washed with brine. The organic layer was dried over sodium sulfate and concentrated. The crude product was purified by Flash column chromatography on silica gel, eluting with 2% of ethylacetate in petroleum ether to get the title compound (8.7 g, 79%) as colourless liquid.

¹H NMR (400 MHz, CDCl₃) δ 7.19-7.15 (m, 1H), 7.03-6.96 (m, 3H), 2.64-2.59 (m, 2H), 2.28 (s, 2H), 1.23 (s, 12H)

Step 4: 2-(3-ethylbenzyl)boronic acid (+)-pinanediol ester A solution of 2-(3-ethylbenzyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (8.7 g, 28.0 mmol) in diethyl ether (90 ml) was treated with (1S, 2S, 3R, 5S)-(+)-pinanediol (7.2 g, 42.0 mmol). The reaction mixture was stirred at room temperature for 12 h then the mixture was washed with water twice, then with brine and dried over anhydrous sodium sulphate, then concentrated. The crude product was purified by flash column chromatography on silica gel, eluting with 3% of ethyl acetate in petroleum ether, to afford the title compound (9.4 g, colourless liquid, 88%).

¹H NMR (400 MHz, CDCl₃): δ 7.19-7.16 (m, 1H), 7.04-6.97 (m, 3H), 4.29 (dd, J=1.88, 8.74 Hz, 1H), 2.65-2.59 (m, 2H), 2.35-2.31 (m, 3H), 2.21-2.17 (m, 1H), 2.06 (t, J=5.84 Hz, 1H), 1.90-1.82 (m, 2H), 1.40 (s, 3H), 1.29 (s, 3H), 1.10-1.07 (m, 1H), 0.84 (s, 3H). GCMS: m/z: 298.1

Step 5: [(1S)-1-chloro-2-(3-ethylbenzyl)boronic acid (+)-pinanediol ester To a cooled (−100° C.) mixture of dichloromethane (3.1 ml, 48.0 mmol) and anhydrous tetrahydrofuran (40 ml) was added n-butyl lithium (1.6 M in hexanes, 11.0 ml, (17.6 mmol) over 20 min. After stirring for 20 min. at −100° C., a solution of 2-(3-ethylbenzyl)boronic acid (+)-pinanediol ester (5.4 g, 16.0 mmol) in anhydrous THF (20 ml) was added over 20 min. Then a solution of zinc chloride (0.5 M in THF, 28.8 mL, 14.4 mmol) was added at −100° C. over 30 min. The mixture was allowed to reach room temperature and stirred for 18 h and concentrated. To the resulting oil was added diethyl ether and saturated ammonium chloride. The organic layer was dried over anhydrous sodium sulphate and concentrated in vacuo. The residue (5.5 g, pale yellow oil, 99%) was taken as such for the next step.

¹H NMR (400 MHz, CDCl₃): δ 7.23-7.21 (m, 1H), 7.11-7.07 (m, 3H), 4.36 (dd, J=1.84, 8.80 Hz, 1H), 3.70-3.66 (m, 1H), 3.20-3.18 (m, 1H), 3.13-3.11 (m, 1H), 2.67-2.61 (m, 2H), 2.35-2.34 (m, 1H), 2.18-2.16 (m, 1H), 2.08 (t, J=5.96 Hz, 1H), 1.92-1.86 (m, 3H), 1.39 (s, 3H), 1.29 (s, 3H), 1.26-1.22 (m, 3H), 1.11-1.08 (m, 1H), 0.85 (s, 3H). GCMS: m/z: 346.2

Step 6: [(1R)-1-[bis(trimethylsilyl)amino]-2-(3-ethybenzyl)boronicacid(+)-pinanediolester

To a cooled (−78° C.) solution of [(1S)-1-chloro-2-(3-ethylbenzyl)boronic acid (+)-pinanediol ester (5.5 g, 15.9 mmol) in 40 ml of anhydrous tetrahydrofuran was added lithium bis(trimethylsilyl)amide (1M in THF, 19.8 ml, 19.8 mmol). The mixture was allowed to attain room temperature, stirred for 18 h and concentrated to dryness. To the resulting residue was added hexane, and then the precipitated solid was filtered off. The filtrate was concentrated to give the required crude product (7.3 g, orange oil, 97%) which was taken as such for the next step without purification.

¹H NMR (400 MHz, CDCl₃): δ 7.18-7.16 (m, 1H), 7.10-7.05 (m, 2H), 7.01-7.00 (m, 1H), 4.30 (dd, J=1.72, 8.72 Hz, 1H), 3.04-3.00 (m, 1H), 2.84-2.83 (m, 1H), 2.67-2.60 (m, 3H), 2.35-2.33 (m, 1H), 2.14-2.12 (m, 1H), 2.02 (t, J=5.80 Hz, 1H), 1.92-1.87 (m, 2H), 1.39 (s, 3H), 1.28 (s, 3H), 1.26-1.22 (m, 3H), 1.00-0.97 (m, 1H), 0.85 (s, 3H), 0.09 (s, 18H).

Step 7: [(1R)-1-amino-2-(3-ethyl benzyl) boronicacid (+)-pinane diol ester trifluoroacetate

A cooled (0° C.) solution of [(1R)-1-[bis(trimethylsilyl)amino]-2-(3-ethylbenzyl)boronic acid (+)-pinanediol ester (7.3 g, 15.5 mmol) in diethyl ether (35 ml) was treated with trifluoroacetic acid (3.6 ml, 46.4 mmol) dropwise. The reaction mixture was then stirred at RT for 3 h. Precipitation was seen. The reaction mixture was cooled to 0° C. and filtered. The filtered solid was washed with cold ether and dried under vacuum to afford the title compound (2.8 g, white solid, 41%).

¹H NMR (400 MHz, CDCl₃): δ 7.78 (s, 3H), 7.26-7.22 (m, 1H), 7.12-7.09 (m, 3H), 4.31 (dd, J=1.80, 8.68 Hz, 1H), 3.20-3.11 (m, 2H), 3.05-2.99 (m, 1H), 2.65-2.59 (m, 2H), 2.24-2.17 (m, 2H), 1.96 (t, J=5.68 Hz, 1H), 1.90-1.88 (m, 1H), 1.85-1.80 (m, 1H), 1.33 (s, 3H), 1.26 (s, 3H), 1.23 (t, J=7.60 Hz, 3H), 1.06-1.03 (m, 1H), 0.80 (s, 3H).

Intermediate 1b: 2-(7-Methyl-benzofuran-3-yl)-1-(1S,2S,6R,8S)-2,9,9-trimethyl-3,5-dioxa-4-bora-tricyclo[6.1.1.02,6]dec-4-yl)ethylamine hydrochloride

Step 1: 7-Methyl-benzofuran-3-carboxylic acid ethyl ester

To a solution of 2-Hydroxy-3-methyl-benzaldehyde (20.00 g; 139.55 mmol; 1.00 eq.) in dichloromethane (120 mL) was added Tetrafluoroboric acid diethylether complex (1.88 ml; 13.96 mmol; 0.10 eq.). To the resulting dark red mixture, Ethyldiazoacetate (31.70 ml; 300.04 mmol; 2.15 eq.) in dichloromethane (80 mL) was added drop wise slowly at 25-30° C. (internal temperature) for about 50 min. (note: evolution of N₂ was observed). After 16 h, concentrated H₂SO4 was added. The reaction mixture was stirred for 30 min. The reaction mixture was then neutralized with solid NaHCO₃, filtered through celite and the filtrate was concentrated to get a crude residue. The residue was purified by column chromatography using 2% ethyl acetate in petroleum ether to afford 7-Methyl-benzofuran-3-carboxylic acid ethyl ester (19.00 g; 86.83 mmol; 62.2%; yellow oil; Purified Product).

HPLC (method A): RT 4.98 min (HPLC purity 93%)

¹H NMR, 400 MHz, CDCl₃: 8.27 (s, 1H), 7.88-7.90 (m, 1H), 7.25-7.29 (m, 1H), 7.17 (d, J=7.32 Hz, 1H), 4.39-4.45 (m, 2H), 2.55 (s, 3H), 1.44 (t, J=7.16 Hz, 3H).

Step 2: (7-Methyl-benzofuran-3-yl)-methanol

To a solution of 7-Methyl-benzofuran-3-carboxylic acid ethyl ester (19.00 g; 86.83 mmol; 1.00 eq.) in Dichloromethane (190.00 ml; 10.00 V) under nitrogen was added Diisobutyl Aluminium Hydride (1.0 M in Toluene) (191.03 ml; 191.03 mmol; 2.20 eq.) drop wise at −78° C. The reaction mixture was allowed to come to RT and stirred for 1 h. The reaction mixture was cooled with ice bath and quenched with an aqueous solution of 1.5N HCl. The resultant mixture (which had sticky solid mass suspended in solvent) was diluted with ethylacetate and filtered through celite. The celite bed was washed thoroughly with ethylacetate and dichloromethane. The filtrate was evaporated to get a crude residue. The solid which remained in the celite bed was taken and triturated with ethylacetate and filtered. The filtrate was mixed together with the crude residue and evaporated. The residue thus obtained was taken in ethylacetate and washed with an aqueous solution of 1.5 N HCl and brine. The organic layer was dried over anhydrous Na₂SO₄ and concentrated. The residue obtained was purified by flash column chromatography using 40-50% ethyl acetate in petroleum ether as eluent to get (7-Methyl-benzofuran-3-yl)-methanol (8.20 g; 48.40 mmol; 55.7%; light yellow oil; Purified Product).

HPLC (method A): RT 3.33 min., (HPLC purity 95.7%).

¹H NMR, 400 MHz, CDCl₃: 7.64 (s, 1H), 7.50-7.52 (m, 1H), 7.17-7.21 (m, 1H), 7.14 (d, J=7.20 Hz, 1H), 4.86-4.86 (m, 2H), 2.54 (s, 3H).

Step 3: 3-(bromomethyl)-7-methyl-benzofuran

To an ice-cooled solution of (7-Methyl-benzofuran-3-yl)-methanol (8.20 g; 48.40 mmol; 1.00 eq.) in Diethyl ether (82.00 ml; 10.00 V) under nitrogen atmosphere was added phosphorus tribromide (1.53 ml; 16.12 mmol; 0.33 eq.) drop wise and the reaction mixture was stirred at ice cold condition for 30 minutes. The reaction mixture was poured into ice and extracted with diethyl ether. The organic layer was dried over anhydrous Na₂SO₄ and concentrated to afford 3-Bromomethyl-7-methyl-benzofuran (10.00 g; 44.43 mmol; 91.8%; colorless oil). The crude product was taken to next step without purification.

¹H NMR, 400 MHz, CDCl₃: 7.71 (s, 1H), 7.53-7.55 (m, 1H), 7.21-7.25 (m, 1H), 7.16 (d, J=7.32 Hz, 1H), 4.65 (s, 2H), 2.48 (s, 3H).

Step 4: 7-Methyl-3-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-ylmethyl)-benzofuran

To a solution of 3-Bromomethyl-7-methyl-benzofuran (10.00 g; 44.43 mmol; 1.00 eq.) in degased Dioxane-1,4 (100.00 ml; 10.00 V) were added Bis(pinacolato)diboron (13.68 g; 53.31 mmol; 1.20 eq.), dried K₂CO₃ (18.61 g; 133.28 mmol; 3.00 eq.) and tetrakis(triphenylphosphine)palladium(0) (2.57 g; 2.22 mmol; 0.05 eq.). The reaction mixture was then heated at 100° C. under nitrogen atmosphere for 16 h. The reaction mixture was diluted with dichloromethane and filtered through celite. The filtrate was concentrated. The residue was dissolved in ethyl acetate and washed with brine. The organic layer was dried over anhydrous Na₂SO₄ and concentrated. The crude was purified by column chromatography using 2% ethyl acetate in petroleum ether to get 7-Methyl-3-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-ylmethyl)-benzofuran (5.00 g; 18.37 mmol; 41.4%; colorless liquid; Purified Product).

¹H NMR, 400 MHz, DMSO-d6: 7.65 (s, 1H), 7.33-7.35 (m, 1H), 7.07-7.13 (m, 2H), 2.43 (s, 3H), 2.13 (s, 2H), 1.16 (s, 12H).

Step 5: Trimethyl-4-(7-methyl-benzofuran-3-ylmethyl)-3,5-dioxa-4-bora-tricyclo [6.1.1.02,6]decane

To an ice-cooled solution of 7-Methyl-3-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-ylmethyl)-benzofuran (5.00 g; 18.37 mmol; 1.00 eq.) in Et₂O (50.00 ml; 10.00 V) under nitrogen atmosphere was added 1S, 2S, 3R, 5S-(+)-2,3-pinane diol (4.69 g; 27.56 mmol; 1.50 eq.) and the reaction mixture was stirred at RT for 14 h. TLC analysis showed completion of reaction. The reaction mixture was washed with brine. The organic layer was dried over anhydrous Na₂SO₄ and concentrated. The crude was purified by flash column chromatography using 2% ethyl acetate in petroleum ether to get (1S,2S,6R,8S)-2,9,9-Trimethyl-4-(7-methyl-benzofuran-3-ylmethyl)-3,5-dioxa-4-bora-tricyclo[6.1.1.02,6] decane (5.00 g; 13.00 mmol; 70.7%; colorless liquid; Purified

Product).

GCMS: m/z: 324.2

¹H NMR, 400 MHz, CDCl₃: 7.53-7.55 (m, 1H), 7.39-7.40 (m, 1H), 7.12-7.27 (m, 1H), 7.06-7.08 (m, 1H), 4.31-4.34 (m, 1H), 2.53 (s, 3H), 2.30-2.37 (m, 1H), 2.26 (s, 2H), 2.18-2.23 (m, 1H), 2.07 (t, J=5.76 Hz, 1H), 1.84-1.93 (m, 2H), 1.42 (s, 3H), 1.29 (s, 3H), 1.12-1.15 (m, 1H), 0.85 (s, 3H).

Step 6: (1S,2S,6R,8S)-4-[1-Chloro-2-(7-methyl-benzofuran-3-yl)-ethyl]-2,9,9-trimethyl-3,5-dioxa-4-bora-tricyclo[6.1.1.02,6]decane

Dichloromethane (2.96 ml; 46.26 mmol; 3.00 eq.) in THF (40 mL) was taken in a RB-flask under a positive pressure of nitrogen and cooled to −95° C. using liquid nitrogen-ethanol mixture. To this n-butyl lithium (1.6 M in hexanes) (10.60 ml; 16.96 mmol; 1.10 eq.) was added drop wise through the sides of the RB-flask (at a medium rate, addition took about 30 min.) so that the internal temperature was maintained between −95° C. and −100° C. After addition, the reaction mixture was stirred for 20 minutes. During the course of the reaction a white precipitate was formed (The internal temperature was maintained between −95° C. and −100° C.). Then a solution of (1S,2S,6R,8S)-2,9,9-Trimethyl-4-(7-methyl-benzofuran-3-ylmethyl)-3,5-dioxa-4-bora-tricyclo[6.1.1.02,6]decane (5.00 g; 15.42 mmol; 1.00 eq.) in THF (20 mL) was added drop wise through the sides of the RB-flask (about 25 min) so that the internal temperature was maintained between −95° C. and −100° C. After addition, immediately zinc chloride (0.5 M in THF) (27.76 ml; 13.88 mmol; 0.90 eq.) was added drop wise through the sides of the RB-flask (at a medium rate, addition took about 45 min.) so that the internal temperature was maintained between −95° C. and −100° C. The reaction mixture was then slowly allowed to attain RT and stirred at RT for 16 h. The reaction mixture was concentrated (temperature of the bath 30° C.). The residue was partitioned between diethylether and saturated NH₄Cl solution. The organic layer was separated, dried over anhydrous Na₂SO₄ and concentrated (temperature of bath 30° C.) to afford (1S,2S,6R,8S)-4-[1-Chloro-2-(7-methyl-benzofuran-3-yl)-ethyl]-2,9,9-trimethyl-3,5-dioxa-4-bora-tricyclo[6.1.1.02,6]decane (5.90 g; 15.83 mmol; 102.7%; brown liquid; Crude Product).

¹H NMR, 400 MHz, CDCl₃: 7.57 (s, 1H), 7.42-7.44 (m, 1H), 7.27 (s, 1H), 7.09-7.18 (m, 1H), 4.34-4.36 (m, 1H), 3.74-3.76 (m, 1H), 3.28-3.30 (m, 1H), 3.20-3.22 (m, 1H), 2.52 (s, 3H), 2.32-2.34 (m, 1H), 2.07 (t, J=5.88 Hz, 1H), 1.85-1.91 (m, 2H), 1.42 (s, 3H), 1.29 (s, 3H), 1.06-1.09 (m, 1H), 0.85 (s, 3H).

Step 7: ((1S,2S,6R,8S)-4-[1-(1,1,1,3,3,3-Hexamethyl-disilazan-2-yl)-2-(7-methyl-benzofuran-3-yl)-ethyl]-2,9,9-trimethyl-3,5-dioxa-4-bora-tricyclo[6.1.1.02,6]decane

A solution of (1S,2S,6R,8S)-4-[1-Chloro-2-(7-methyl-benzofuran-3-yl)-ethyl]-2,9,9-trimethyl-3,5-dioxa-4-bora-tricyclo[6.1.1.02,6]decane (5.90 g; 15.83 mmol; 1.00 eq.) in THF (40.00 ml; 6.78 V) under a positive pressure of nitrogen atmosphere was cooled to −78° C. To this a solution of lithium (bistrimethylsilyl)amide (1.0 M in THF) (17.41 ml; 17.41 mmol; 1.10 eq.) was added drop wise over a period of 30 minutes. The reaction mixture was allowed to attain RT and stirred at RT for 18 h. The reaction mixture was evaporated at 30° C. The residue was triturated with n-hexane and the solid formed was filtered. The filtrate was concentrated at 30° C. to get (1S,2S,6R,8S)-4-[1-(1,1,1,3,3,3-Hexamethyl-disilazan-2-yl)-2-(7-methyl-benzofuran-3-yl)-ethyl]-2,9,9-trimethyl-3,5-dioxa-4-bora-tricyclo[6.1.1.02,6]decane (6.00 g; 12.06 mmol; 76.2%; brown dark oil; Crude Product).

The crude product was taken to next step without purification. The product was confirmed by ¹H-NMR and was unstable in LCMS conditions.

¹H NMR, 400 MHz, CDCl₃: 7.50 (s, 1H), 7.41-7.43 (m, 1H), 7.12-7.16 (m, 1H), 7.06-7.08 (m, 1H), 4.29-4.32 (m, 1H), 3.17-3.09 (m, 1H), 2.70-2.89 (m, 1H), 2.52-2.70 (m, 1H), 2.52 (s, 3H), 2.28-2.31 (m, 1H), 2.14-2.14 (m, 1H), 2.03 (t, J=5.68 Hz, 1H), 1.78-1.89 (m, 2H), 1.39 (s, 3H), 1.31 (s, 3H), 1.01-1.04 (m, 1H), 0.90-0.92 (m, 2H), 0.88 (s, 3H), 0.12 (s, 18H).

Step 8: 2-(7-Methyl-benzofuran-3-yl)-1-((1S,2S,6R,8S)-2,9,9-trimethyl-3,5-dioxa-4-bora-tricyclo[6.1.1.02,6]dec-4-yl)-ethylamine hydrochloride

A stirred solution of (1S,2S,6R,8S)-4-[1-(1,1,1,3,3,3-Hexamethyl-disilazan-2-yl)-2-(7-methyl-benzofuran-3-yl)-ethyl]-2,9,9-trimethyl-3,5-dioxa-4-bora-tricyclo[6.1.1.02,6]decane (6.00 g; 12.06 mmol; 1.00 eq.) in Diethyl ether (60.00 ml; 10.00 V) under nitrogen atmosphere was cooled to −10° C. To this 2M solution of Hydrochloric acid in diethylether (15.07 ml; 30.14 mmol; 2.50 eq.) was added drop wise. The reaction mixture was stirred at RT for 2 h. The reaction mixture was evaporated at 30° C. To the residue diethyl ether (20 mL) was added and the solid formed was filtered off, washed with cold diethyl ether and dried under vacuum to get 2-(7-Methyl-benzofuran-3-yl)-1-((1S,2S,6R,8S)-2,9,9-trimethyl-3,5-dioxa-4-bora-tricyclo[6.1.1.02,6]dec-4-yl)-ethylamine hydrochloride (3.50 g; 8.98 mmol; 74.5%; brown orange solid; Crude Product).

¹H NMR, 400 MHz, DMSO-d6: 8.09 (s, 3H), 7.83 (s, 1H), 7.52-7.53 (m, 1H), 7.12-7.19 (m, 2H), 4.39 (dd, J=1.84, 8.62 Hz, 1H), 3.07-3.13 (m, 1H), 3.03-3.07 (m, 2H), 2.43 (s, 4H), 2.28-2.30 (m, 1H), 2.07-2.08 (m, 1H), 1.92 (t, J=5.68 Hz, 1H), 1.82-1.84 (m, 1H), 1.71-1.75 (m, 1H), 1.19-1.25 (m, 8H), 1.00-1.08 (m, 1H), 0.78 (s, 3H).

Intermediate 1c: (R)-2-(2,3-Dihydro-benzofuran-3-yl)-1-((1S,2S,6R,8S)-2,9,9-trimethyl-3,5-dioxa-4-bora-tricyclo[6.1.1.02,6]dec-4-yl)-ethylamine hydrochloride

Step 1: (1S,2S,6R,8S)-4-(2,3-Dihydro-benzofuran-3-ylmethyl)-2,9,9-trimethyl-3,5-dioxa-4-bora-tricyclo[6.1.1.02,6]decane

To a solution of (1S,2S,6R,8S)-4-Benzofuran-3-ylmethyl-2,9,9-trimethyl-3,5-dioxa-4-bora-tricyclo[6.1.1.02,6]decane (5.00 g; 10.72 mmol; 1.00 eq.) in methanol (100.00 ml; 20.00 V) in a tiny clave was added palladium on carbon (10 wt %) (2.28 g; 2.14 mmol; 0.20 eq.). The contents were hydrogenated under a H₂ pressure of 5 Kg/cm² for 3 h. TLC analysis revealed complete conversion. The reaction mixture was filtered through celite and the filtrate was evaporated. The crude was purified by Biotage-isolera column chromatography (C18 column; mobile phase: ACN/H₂O; 50:50 isocratic) to get a (1S,2S,6R,8S)-4-(2,3-Dihydro-benzofuran-3-ylmethyl)-2,9,9-trimethyl-3,5-dioxa-4-bora-tricyclo[6.1.1.02,6]decane (4.10 g; 13.13 mmol; 122.5%; pale yellow liquid; Purified Product).

GCMS: m/z : 312.3.

Step 2: (1S,2S,6R,8S)-4-[1-Chloro-2-(7-methyl-benzofuran-3-yl)-ethyl]-2,9,9-trimethyl-3,5-dioxa-4-bora-tricyclo[6.1.1.02,6]decane

Dichloromethane (2.46 ml; 38.44 mmol; 3.00 eq.) in THF (40.00 ml; 10.00 V) was taken in a RB-flask under a positive pressure of nitrogen and cooled to −95° C. using liquid nitrogen-ethanol mixture. To this n-butyl lithium (1.6 M in THF) (8.81 ml; 14.09 mmol; 1.10 eq.) was added drop wise through the sides of the RB-flask (at a medium rate, addition took about 20 min.) so that the internal temperature was maintained between −95° C. and −100° C. After addition, the reaction mixture was stirred for 25 minutes. During the course of the reaction a white precipitate was formed (The internal temperature was maintained between −95° C. and −100° C.). Then a solution of (1S,2S,6R,8S)-4-(2,3-Dihydro-benzofuran-3-ylmethyl)-2,9,9-trimethyl-3,5-dioxa-4-bora-tricyclo[6.1.1.02,6]decane (4.00 g; 12.81 mmol; 1.00 eq.) in THF (15.00 ml; 3.75 V) was added drop wise through the sides of the RB-flask (about 25 min) so that the internal temperature was maintained between −95° C. and −100° C. After addition, immediately zinc chloride (0.5 M in THF) (25.62 ml; 12.81 mmol; 1.00 eq.) was added drop wise through the sides of the RB-flask (at a medium rate, addition took about 25 min.) so that the internal temperature was maintained between −95° C. and −100° C. The reaction mixture was then slowly allowed to attain RT and stirred at RT for 18 h. The reaction mixture was concentrated (temperature of the bath 30° C.). The residue was partitioned between diethylether and saturated NH₄Cl solution. The organic layer was dried over anhydrous Na₂SO₄ and concentrated (temperature of bath 30° C.) to afford (1S,2S,6R,8S)-4-[(S)-1-Chloro-2-(2,3-dihydro-benzofuran-3-yl)-ethyl]-2,9,9-trimethyl-3,5-dioxa-4-bora-tricyclo[6.1.1.02,6]decane (4.60 g; 12.75 mmol; 99.5%; yellow oil; Crude Product). The product was unstable in LCMS & HPLC conditions and was confirmed by ¹H NMR.

Chiral data could not be taken for the product. The product was assumed to be major S-isomer.

1H NMR, 400 MHz, CdCl₃: 7.29 (d, J=6.72 Hz, 1H), 7.21-7.10 (m, 1H), 6.90-6.77 (m, 2H), 4.68-4.65 (m, 1H), 4.32-4.29 (m, 2H), 3.65-3.60 (m, 1H), 2.40-2.08 (m, 4H), 1.94-1.85 (m, 2H), 1.42 (s, 3H), 1.33 (s, 3H), 1.22 (s, 3H), 1.17-1.15 (m, 1H), 0.86 (s, 3H).

Step 3: (1S,2S,6R,8S)-4-[(R)-2-(2,3-Dihydro-benzofuran-3-yl)-1-(1,1,1,3,3,3-hexamethyl-disilazan-2-yl)-ethyl]-2,9,9-trimethyl-3,5-dioxa-4-bora-tricyclo[6.1.1.02,6]decane

A solution of (1S,2S,6R,8S)-4-[(S)-1-Chloro-2-(2,3-dihydro-benzofuran-3-yl)-ethyl]-2,9,9-trimethyl-3,5-dioxa-4-bora-tricyclo[6.1.1.02,6]decane (4.60 g; 12.75 mmol; 1.00 eq.) in THF (45.00 ml; 9.78 V) under a positive pressure of nitrogen atmosphere was cooled to −78° C. To this a solution of Lithium(bistrimethylsilyl)amide (1.0 M in THF) (16.58 ml; 16.58 mmol; 1.30 eq.) was added drop wise over a period of 30 minutes. The reaction mixture was allowed to attain RT and stirred at RT for 18 h. The reaction mixture was evaporated at 30° C. The residue was triturated with hexane and the solid formed was filtered. The filtrate was allowed to stand for some time under vacuum and any solid if formed was filtered again. The filtrate was concentrated at 30° C. to get (1S,2S,6R,8S)-4-[(R)-2-(2,3-Dihydro-benzofuran-3-yl)-1-(1,1,1,3,3,3-hexamethyl-disilazan-2-yl)-ethyl]-2,9,9-trimethyl-3,5-dioxa-4-bora-tricyclo[6.1.1.02,6]decane (3.77 g; 7.76 mmol; 60.9%; yellow oil; Crude Product).The crude product was taken to next step without purification. The product was confirmed by ¹H-NMR and was unstable in LCMS conditions.

The mayor product formed is the R-isomer.

1H NMR, 400 MHz, CdCl₃: 7.22-7.10 (m, 2H), 6.90-6.79 (m, 2H), 4.62-4.59 (m, 1H), 4.33-4.27 (m, 1H), 2.34-2.20 (m, 2H), 2.07-2.05 (m, 1H), 1.94-1.84 (m, 2H), 1.40 (s, 3H), 1.30 (s, 3H), 1.15-1.13 (m, 1H), 0.86 (s, 3H), 0.10 (s, 18H).

Step 4: (R)-2-(2,3-Dihydro-benzofuran-3-yl)-1-((1S,2S,6R,8S)-2,9,9-trimethyl-3,5-dioxa-4-bora-tricyclo[6.1.1.02,6]dec-4-yl)-ethylamine hydrochloride

A stirred solution of (1S,2S,6R,8S)-4-[(R)-2-(2,3-Dihydro-benzofuran-3-yl)-1-(1,1,1,3,3,3-hexamethyl-disilazan-2-yl)-ethyl]-2,9,9-trimethyl-3,5-dioxa-4-bora-tricyclo[6.1.1.02,6]decane (3.77 g; 7.76 mmol; 1.00 eq.) in Et₂O (35.00 ml; 9.28 V) under nitrogen atmosphere was cooled to −10° C. To this 2M solution of Hydrochloric acid in diethylether (9.70 ml; 19.41 mmol; 2.50 eq.) was added drop wise. The reaction mixture was stirred at RT for 2 h. The reaction mixture was evaporated to dryness under reduced pressure to get a solid. The solid formed was triturated with diethylether, filtered, washed with diethylether and dried under vacuum to get (R)-2-(2,3-Dihydro-benzofuran-3-yl)-1-((1S,2S,6R,8S)-2,9,9-trimethyl-3,5-dioxa-4-bora-tricyclo[6.1.1.02,6]dec-4-yl)-ethylamine hydrochloride (2.30 g; 5.25 mmol; 67.7%; pale brown solid; Purified Product).

Analysis showed the presence of isomers (˜65.50% +20.75%) at the indicated (*) position.

LCMS: 4.73 min., 86.25% (max), 80.47% (220 nm), 342.20 (M+1).

1H NMR, 400 MHz, DMSO-d6: 8.11 (s, 3H), 7.23-7.19 (m, 1H), 7.13-7.10 (m, 1H), 6.85 (t, J=7.40 Hz, 1H), 6.77 (d, J=8.04 Hz, 1H), 4.61-4.57 (m, 1H), 4.48-4.45 (m, 1H), 4.25-4.22 (m, 1H), 3.68-3.62 (m, 1H), 2.90-2.85 (m, 1H), 2.34-2.32 (m, 1H), 2.19-2.17 (m, 1H), 2.02-1.99 (m, 2H), 1.89-1.77 (m, 3H), 1.39 (s, 3H), 1.25 (s, 3H), 1.17-1.14 (m, 1H), 0.82 (s, 3H).

By similar sequences the following compounds can be prepared:

wherein the group Y denotes for example one of the following groups:

In accordance with the definitions above Rx and Ry may denote independently Hal, CN, R^(3a), OR^(3a), CONHR^(3a), CONR^(3b)R^(3a), CONH₂, NR^(3a)COR^(3b), SO₂R^(3a), SOR^(3a), NHR^(3a), N(R^(3a))₂, (CH₂)_(q)—SR^(3a), (CH₂)_(q)—N(R^(3a))₂ and/or (CH₂)_(q)—Z. In particular R may be selected from a group consisting of F, Cl, Br, OCH₃, OC₂H₅, CH₂OCH₃, CH₃, C₂H₅, CF₃, OCF₃, phenyl, biphenyl, naphtyl, furyl, thienyl, pyrrolyl, imidazolyl, morpholinyl, piperazinyl, benzofuryl, benzodioxolyl and/or pyridyl or even more preferably selected from from a group comprising F, Cl, Br, CH₃, C₂H₅, CF₃, OCH₃, OC₂H₅, COCF₃, SCH₃, SC₂H₅, N(CH₃)₂, CH₂N(CH₃)₂ and/or N(C₂H₅)₂.

Intermediate 2: 3-(methylsulfonyl)propanoic acid

3-(methylthio)propanoic acid (1.0 g, 8.32 mmol was dissolved in ethyl acetate/water (10 mL/20 mL), cooled to 0° C. and oxone (15.34 g, 24.96 mmol) was added. The resulting suspension was stirred at RT for 12 h. The solid was filtered, washed with ethyl acetate. The filtrate was separated and dried over anhydrous Na₂SO₄ and concentrated to get the title compound as white solid (0.7 g, 55%).

¹H NMR (400 MHz, DMSO-d₆): δ 12.53 (s, 1H), 3.32-3.30 (m, 2H), 3.00 (s, 3H), 2.67 (t, J=7.40 Hz, 2H)

MS (ESI-): 151.0

The following compounds were synthesized using the same procedure followed for Intermediate 2

Intermediate 3: 4-(methylsulfonyl)butanoic acid

White solid. ¹H NMR (400 MHz, DMSO-d₆): δ 12.17 (s, 1H), 3.31-3.10 (m, 2H), 2.95 (s, 3H), 2.49-2.36 (m, 2H), 1.92-1.88 (m, 2H) MS (ESI-): 165.0

Intermediate 4: 5-(methylsulfonyl)pentanoic acid

White solid. ¹H NMR (400 MHz, DMSO-d₆): δ 12.07 (s, 1H), 3.10-3.08 (m, 2H), 2.93 (s, 3H), 2.25 (t, J=7.08 Hz, 2H), 1.71-1.65 (m, 2H), 1.63-1.57 (m, 2H) MS (ESI+): 181.0

Example 1 [(1R)-(2-(3-ethylphenyl)-1-(3-(methylsulfonyl)propanamido)ethyl) boronic acid (compound No. 20)

Step 1: (R)-(2-(3-ethylphenyl)-1-(3-(methylsulfonyl)propanamido)ethyl)boronic acid (+)-pinanediol ester

A cooled (−10° C.) solution of Intermediate 1 (200 mg, 0.45 mmol) in anhydrous N,N-dimethylformamide (10 ml) was treated with diisopropylethylamine (0.24 ml, 1.36 mmol), 3-(methylsulfonyl)propanoic acid (Intermediate 2, 69 mg, 0.45 mmol) and O-(Benzotriazol-1-yl)-N,N,N′,N′-tetramethyluronium tetrafluoroborate (174 mg, 0.54 mmol). The reaction mixture was stirred at −10° C. for 3h. The reaction mixture was concentrated under reduced pressure keeping an external bath temperature below 30° C., and then 25 ml ethyl acetate were added. The organic layer was washed with brine, dried over sodium sulfate and concentrated. The desired product (180 mg, 40%) was isolated by purification by flash chromatography on silica gel, eluting with 1% methanol in dichloromethane.

MS (ESI+): 462.3

Step 2: (R)-(2-(3-ethylphenyl)-1-(3-(methylsulfonyl)propanamido)ethyl)boronic acid

A cooled (0° C.) solution of (R)-(2-(3-ethylphenyl)-1-(3-(methylsulfonyl) propanamido) ethyl)boronic acid(+)-pinanediol ester (180 mg, 0.18 mmol) in methanol / pentane (1:1, 20 mL) was treated with 2-methyipropyl boronic acid (77 mg, 0.73 mmol) and an aqueous HCl solution (1.5 N, 1 mL) and the reaction mixture was stirred at room temperature for 15 h. The reaction mixture was then extracted with pentane thrice. The aqueous methanol layer was concentrated at temperature below 30° C. The residue was treated with ice and basified with an aqueous (2N) solution of NaOH and extracted with dichloromethane thrice (discarded). The aqueous layer was then acidified with an aqueous (1.5 N) HCl solution and extracted with dichloromethane thrice. The DCM layer was dried over sodium sulfate, filtered and concentrated to give a solid residue, which was triturated with diethylether and lyophilized to obtain the title compound (10 mg, 15%) as a white solid.

¹ NMR: (400 MHz, DMSO-d₆): δ 7.15-7.11 (m, 1H), 6.99-6.94 (m, 3H), 3.23-3.19 (m, 3H), 2.89 (s, 3H), 2.81-2.76 (m, 1H), 2.68-2.62 (m, 1H), 2.54-2.52 (m, 3H), 2.47-2.45 (m, 1H), 1.16-1.12 (m, 3H). MS (ESI+): 310.3 [M+H—H₂O], HPLC (Method A): Rt 2.7 min; HPLC purity 93.3%

The following compounds were synthesized using the same procedure followed for Example 1:

Example 2 (R)-(1-(5-(dimethylamino)-5-oxopentanamido)-2-(3-ethylphenyl) ethyl) boronic acid (Compound No. 18)

White solid. ¹H NMR: (400 MHz, DMSO-d₆): δ 7.14-7.10 (m, 1H), 6.97-6.92 (m, 3H), 3.05-3.02 (m, 1H), 2.86 (s, 3H), 2.77-2.72 (m, 4H), 2.61-2.53 (m, 2H), 2.47-2.45 (m, 1H), 2.18-2.14 (m, 2H), 2.08-2.04 (m, 2H), 1.66-1.58 (m, 2H), 1.12-1.08 (m, 3H). MS (ESI+): 317.3 [M+H—H₂O]. HPLC (Method A): Rt. 2.7 min, HPLC purity 96.4%.

Example 3 [(1R)-(2-(3-ethylphenyl)-1-(4-(methylsulfonyl)butanamido)ethyl) boronic acid (Compound No. 21)

White solid. ¹H NMR: (400 MHz, DMSO-d₆): δ 7.15-7.11 (m, 1H), 6.98-6.93 (m, 3H), 3.18-3.14 (m, 1H), 3.02-2.94 (m, 2H), 2.90 (s, 3H), 2.80-2.75 (m, 1H), 2.67-2.61 (m, 1H), 2.56-2.52 (m, 2H), 2.18-2.13 (m, 2H), 1.87-1.75 (m, 2H), 1.21-1.12 (m, 3H). MS (ESI+): 324.2 [M+H—H₂O]. HPLC (Method A): Rt. 2.7 min, HPLC purity 84.5%

Example 4 (R)-(2-(3-ethylphenyl)-1-(5-(methylsulfonyl)pentanamido)ethyl) boronic acid (Compound No. 22)

White solid. ¹H NMR: (400 MHz, DMSO-d₆): δ 7.11-7.15 (m, 1H), 6.93-6.98 (m, 3H), 3.10-3.66 (m, 1H), 3.02-3.08 (m, 2H), 2.89 (s, 3H), 2.73-2.78 (m, 1H), 2.59-2.65 (m, 1H), 2.51-2.55 (m, 2H), 2.06 (t, J=6.72 Hz, 2H), 1.52-1.62 (m, 4H), 1.13 (t, J=7.60 Hz, 3H) MS (ESI+): 338.3 [M+H—H₂O]. HPLC (Method A): Rt. 2.7 min, HPLC purity 96.8%

Examples 5 to 33 describe further compounds of the invention, which are obtainable using similar methods:

Example 5 [(1R)-1-[3-(N-acetylanilino)propanoylamino]-2-phenyl-ethyl]boronic acid (Compound No. 1)

1H NMR (400 MHz, DMSO-d6): δ 7.46-7.31 (m, 3H), 7.24-7.08 (m, 7H), 3.75-3.66 (m, 2H), 3.07 (dd, J=8.9, 5.5, 1H), 2.75 (dd, J=13.9, 5.6, 1H), 2.60 (dd, J=13.8, 8.9, 1H), 2.23 (t, J=7.6, 2H), 1.65 (s, 3H). MS (ESI+): 337.2 [M+H—H₂O]. HPLC (Method B): Rt. 3.9 min.

Example 6 [(1R)-1-[3-(N-ethylsulfonylanilino)propanoylamino]-2-(p-tolyl)ethyl]boronic acid (Compound No. 2)

1H NMR (400 MHz, DMSO-d6) ppm=7.38-7.31 (m, 3H), 7.22-7.20 (m, 2H), 7.04-6.98 (m, 4H), 3.74 (t, J=7.00 Hz, 2H), 3.07-3.02 (m, 2H), 2.94-2.90 (m, 1H), 2.70-2.65 (m, 1H), 2.20-2.18 (m, 5H), 1.18-1.15 (m, 3H). MS (ESI+): 401.3[M+H—H₂O]. HPLC (Method B): Rt. 3.5 min.

Example 7 [(1R)-1-[3-(N-methylsulfonylanilino)propanoylamino]-2-(p-tolyl)ethyl]boronic acid (Compound No. 3)

1H NMR: (400 MHz, DMSO-d6): 7.32-7.39 (m, 3H), 7.20-7.22 (m, 2H), 6.98-7.03 (m, 4H), 3.74 (t, J=6.88 Hz, 2H), 2.90-2.93 (m, 4H), 2.65-2.70 (m, 1H), 2.46-2.49 (m, 1H), 2.18-2.22 (m, 5H). MS (ESI+): 387.2 [M+H—H₂O]. HPLC (Method A): Rt. 3.3 min.

Example 8 [(1R)-1-[3-(benzenesulfonyl)propanoylamino]-2-(benzofuran-3-yl)ethyl]boronic acid (Compound No. 4)

1H NMR (400 MHz, DMSO-d6) ppm=7.84-7.79 (m, 2H), 7.75-7.69 (m, 1H), 7.66-7.58 (m, 3H), 7.57-7.52 (m, 1H), 7.46 (d, J=8.1, 1H), 7.28-7.22 (m, 1H), 7.21-7.15 (m, 1H), 3.40-3.30 (m, 2H), 3.17 (dd, J=8.5, 5.5, 1H), 2.83 (dd, J=14.9, 5.4, 1H), 2.72 (dd, J=14.9, 8.5, 1H), 2.42-2.31 (m, 2H). MS (ESI+): 384.2 [M+H—H₂O]. HPLC (Method B): Rt. 4.5 min.

Example 9 [(1R)-1-[3-[benzenesulfonyl(ethyl)amino]propanoylamino]-2-(p-tolyl)ethyl]boronic acid (Compound No. 5)

1H NMR: (400 MHz, DMSO-d6): 7.71-7.73 (m, 2H), 7.63-7.67 (m, 1H), 7.56-7.60 (m, 2H), 6.97-6.99 (m, 4H), 3.14-3.19 (m, 2H), 3.04-3.09 (m, 3H), 2.68-2.73 (m, 1H), 2.55-2.59 (m, 1H), 2.28 (t, J=7.20 Hz, 2H), 2.18 (s, 3H), 0.90 (t, J=7.12 Hz, 3H). MS (ESI+): 401.3 [M+H—H₂O]. HPLC (Method A): Rt. 3.7 min.

Example 10 [(1R)-1-[3-[benzenesulfonyl(isopropyl)amino]propanoylamino]-2-(p-tolyl)ethyl]boronic acid (Compound No. 6)

1H NMR (500 MHz, DMSO-d6) ppm=7.79-7.73 (m, 2H), 7.68-7.63 (m, 1H), 7.61-7.56 (m, 2H), 7.04-6.98 (m, 4H), 3.96-3.88 (m, 1H), 3.17-3.07 (m, 3H), 2.74 (dd, J=13.7, 5.6, 1H), 2.60 (dd, J=13.7, 8.9, 1H), 2.41-2.35 (m, 2H), 2.19 (s, 3H), 0.88 (d, J=6.7, 6H). MS (ESI+): 415.3 [M+H—H₂O]. HPLC (Method B): Rt. 5.1 min.

Example 11 [(1R)-1-[3-[benzenesulfonyl(methyl)amino]propanoylamino]-2-(p-tolyl)ethyl]boronic acid (Compound No. 7):

1H NMR: (400 MHz, DMSO-d6): δ 7.68-7.74 (m, 3H), 7.61-7.65 (m, 2H), 7.01 (s, 4H), 3.13-3.15 (m, 1H), 3.06 (t, J=7.44 Hz, 2H), 2.71-2.76 (m, 1H), 2.59-2.64 (m, 4H), 2.26 (t, J=7.20 Hz, 2H), 2.21 (s, 3H). MS (ESI+): 387.2 [M+H—H₂O]. HPLC (Method A): Rt. 3.5 min.

Example 12 [(1R)-1-[3-[benzoyl(ethyl)amino]propanoylamino]-2-phenyl-ethyl]boronic acid (Compound No. 8)

1H NMR (500 MHz, DMSO-d6): δ 7.44-7.38 (m, 3H), 7.32-7.25 (m, 2H), 7.24-7.03 (m, 5H), 3.56-3.44 (m, 1H), 3.40-3.02 (m, 4H), 2.85-2.71 (m, 1H), 210-2.56 (m, 1H), 2.42-2.22 (m, 21-1), 1.11-0.88 (m, 3H). MS (ESI+): 351 [M+H—H₂O]. HPLC (Method. B): Rt. 4.0 min.

Example 13 [(1R)-1-[3-[benzoyl(isopropyl)amino]propanoylamino]-2-phenyl-ethyl]boronic acid (Compound No. 9)

1H NMR (500 MHz, DMSO-d6): δ 7.51-7.40 (m, 3H), 7.40-7.00 (m, 7H), 3.81-3.71 (m, 1H), 3.49-3.05 (m, 3H), 2.89-2.64 (m, 2H), 2.51-2.16 (m, 2H), 1.31-0.91 (m, 6H). MS (ESI+): 365.2 [M+H—H₂O]. HPLC (Method B): Rt. 4.4 min.

Example 14 [(1R)-1-[3-[benzoyl(methyl)amino]propanoylamino]-2-phenyl-ethyl]boronic acid (Compound No. 10)

1H NMR (500 MHz, DMSO-d6): δ 7.45-7.38 (m, 3H), 7.33-7.28 (m, 2H), 7.24-7.04 (m, 5H), 3.61-3.53 (m, 1H), 3.35-3.27 (m, 1H), 3.15-3.05 (m, 1H), 2.86 (s, 1H), 2.83-2.71 (m, 3H), 2.67-2.55 (m, 1H), 2.45-2.35 (m, 1H), 2.34-2.25 (m, 1H). MS (ESI+): 337.2 [M+H—H₂O]. HPLC (Method B): Rt. 3.7 min.

Example 15 [(1R)-1-[3-[ethyl(ethylsulfonyl)amino]propanoylamino]-2-(p-tolyl)ethyl]boronic acid (Compound No. 11)

1H NMR: (400 MHz, DMSO-d6): 7.01-7.05 (m, 4H), 2.90-3.38 (m, 7H), 2.55-2.70 (m, 3H), 2.31-2.33 (m, 1H), 2.18-2.20 (m, 3H), 0.98-1.16 (m, 6H). MS (ESI+): 353.3 [M+H—H₂O]. HPLC (Method B): Rt. 2.95 min.

Example 16 [(1R)-1-[3-[ethyl-(2-methylbenzoyl)amino]propanoylamino]-2-phenyl-ethyl]boronic acid (Compound No. 12)

1H NMR (400 MHz, DMSO-d6) ppm=7.38-7.31 (m, 1H), 7.31-7.25 (m, 3H), 7.25-7.16 (m, 3H), 7.16-7.07 (m, 2H), 3.67-3.51 (m, 2H), 3.20 (dd, J=8.9, 5.6, 1H), 3.07-2.94 (m, 2H), 2.87 (dd, J=14.0, 5.7, 1H), 2.71 (dd, J=13.9, 8.9, 1H), 2.54-2.44 (m, 2H), 2.17 (s, 3H), 0.93 (t, J=7.1, 3H). MS (ESI+): 365.3 [M+H—H₂O]. HPLC (Method B): Rt. 4.3 min.

Example 17 [(1R)-1-[3-[ethyl-(3-methylbenzoyl)amino]propanoylamino]-2-phenyl-ethyl]boronic acid (Compound No. 13)

1H NMR (400 MHz, DMSO-d6) ppm=7.30-7.01 (m, 9H), 3.56-3.45 (m, 1H), 3.37-3.01 (m, 4H), 2.87-2.55 (m, 2H), 2.42-2.22 (m, 5H), 1.12-0.86 (m, 3H). MS (ESI+): 365.3 [M+H—H₂O]. HPLC (Method B): Rt. 4.3 min.

Example 18 [(1R)-1-[3-[ethyl-(4-methylbenzoyl)amino]propanoylamino]-2-phenyl-ethyl]boronic acid (Compound No. 14)

1H NMR (400 MHz, DMSO-d6) ppm=7.23-7.15 (m, 6H), 7.15-7.09 (m, 3H), 3.45 (t, J=7.2, 2H), 3.27-3.17 (m, 3H), 2.83 (dd, J=13.9, 5.8, 1H), 2.69 (dd, J=13.9, 8.4, 1H), 2.38-2.32 (m, 2H), 2.31 (s, 3H), 1.01 (t, J=7.1, 3H). MS (ESI+): 365.3 [M+H—H₂O]. HPLC (Method B): Rt. 4.3 min.

Example 19 [(1R)-1-[3-[isopropyl(methylsulfonyl)amino]propanoylamino]-2-(p-tolyl)ethyl]boronic acid (Compound No. 15)

1H NMR: (400 MHz, DMSO-d6): 7.01 (s, 4H), 3.81-3.78 (m, 1H), 3.15-3.11 (m, 2H), 3.02-2.98 (m, 1H), 2.81 (s, 3H), 2.73-2.68 (m, 1H), 2.55-2.49 (m, 1H), 2.35 (t, J=7.80 Hz, 2H), 2.18 (s, 3H), 1.06-1.03 (m, 6H). MS (ESI+): 353.3 [M+H—H₂O]. HPLC (Method A): Rt. 3.0 min.

Example 20 [(1R)-1-[[2-[benzenesulfonyl(ethyl)amino]acetyl]amino]-2-(p-tolyl)ethyl]boronic acid (Compound No. 16)

1H NMR (500 MHz, DMSO-d6) ppm=7.77-7.72 (m, 2H), 7.67-7.62 (m, 1H), 7.59-7.53 (m, 2H), 7.04-6.97 (m, 4H), 3.72-3.58 (m, 2H), 3.28 (dd, J=8.0, 5.5, 1H), 2.99 (q, J=7.2, 2H), 2.78 (dd, J=13.8, 5.5, 1H), 2.64 (dd, J=13.8, 8.0, 1H), 2.19 (s, 3H), 0.82 (t, J=7.2, 3H). MS (ESI+): 387.3 [M+H—H₂O]. HPLC (Method B): Rt. 5.1 min.

Example 21 [(1R)-1-[[2-[benzoyl(ethyl)amino]acetyl]amino]-2-phenyl-ethyl]boronic acid (Compound No. 17)

1H NMR (500 MHz, DMSO-d6): δ 7.48-7.02 (m, 10H), 4.04-3.90 (m, 1H), 3.79-3.64 (m, 1H), 3.35-3.01 (m, 3H), 2.92-2.78 (m, 1H), 2.78-2.61 (m, 1H), 1.07-0.87 (m, 3H). MS (ESI+): 337.2 [M+H—H₂O]. HPLC (Method B): Rt. 4.3 min.

Example 22 [(1R)-2-(2,4-dimethylphenyl)-1-[3-[ethyl-(4-methylbenzoyl)amino]-propanoylamino]ethyl]boronic acid (Compound No. 19)

1H NMR (400 MHz, DMSO-d6) ppm=7.23-7.14 (m, 4H), 6.99-6.74 (m, 3H), 3.57-3.20 (m, 3H), 3.11-2.99 (m, 2H), 2.76-2.65 (m, 1H), 2.64-2.52 (m, 1H), 2.43-2.32 (m, 1H), 2.29 (s, 4H), 2.20-2.08 (m, 6H), 1.12-0.87 (m, 3H). MS (ESI+): 393.3 [M+H—H₂O]. HPLC (Method B): Rt. 4.9 min.

Example 23 [(1R)-2-(benzofuran-3-yl)-1-(3-methylsulfonylpropanoylamino)ethyl]-boronic acid (Compound No. 23)

1H NMR (400 MHz, DMSO-d6) ppm=7.60 (s, 1H), 7.58-7.56 (m, 1H), 7.46 (d, J=8.04 Hz, 1H), 7.28-7.19 (m, 2H), 3.25-3.22 (m, 2H), 3.16-3.13 (m, 1H), 2.88 (s, 3H), 2.76-2.74 (m, 1H), 2.73-2.71 (m, 1H), 2.54-2.52 (m, 1H). MS (ESI+): 322.2 [M+H—H₂O]. HPLC (Method A): Rt. 2.4 min.

Example 24 [(1R)-2-(2,4-dimethylphenyl)-1-([[2-[ethyl(propanoyl)amino]acetyl]-amino]ethyl]boronic acid (Compound No. 24)

1H NMR (400 MHz, DMSO-d6) ppm=6.94-6.89 (m, 1H), 6.89-6.86 (m, 1H), 6.86-6.80 (m, 1H), 3.85-3.68 (m, 2H), 3.32-3.04 (m, 3H), 2.83-2.68 (m, 1H), 2.68-2.54 (m, 1H), 2.35-2.22 (m, 1H), 2.22-2.09 (m, 6H), 2.09-1.89 (m, 1H), 1.02-0.90 (m, 3H), 0.90-0.80 (m, 3H). MS (ESI+): 317.2 [M+H—H₂O]. HPLC (Method A): Rt. 4.6 min.

Example 25 [(1R)-1-[3-[ethyl-(4-methoxybenzoyl)amino]propanoylamino]-2-(4-fluorophenyl)ethyl]boronic acid (Compound No. 25)

1H NMR (400 MHz, DMSO-d6) ppm=7.28-7.20 (m, 2H), 7.18-7.07 (m, 2H), 7.01-6.89 (m, 4H), 3.75 (s, 3H), 3.55-3.03 (m, 5H), 2.82-2.71 (m, 1H), 2.66-2.55 (m, 1H), 2.40-2.26 (m, 2H), 1.06-0.89 (m, 3H). MS (ESI+): 399.3 [M+H—H₂O]. HPLC (Method B): Rt. 4.4 min.

Example 26 [(1R)-1-[3-[(4-chlorobenzoyl)-ethyl-amino]propanoylamino]-2-(4-fluorophenyl)ethyl]boronic acid (Compound No. 26)

1H NMR (400 MHz, DMSO-d6) ppm=7.50-7.43 (m, 2H), 7.36-7.28 (m, 2H), 7.22-6.90 (m, 4H), 3.54-3.42 (m, 1H), 3.40-2.96 (m, 4H), 2.83-2.69 (m, 1H), 2.69-2.53 (m, 1H), 2.44-2.19 (m, 2H), 1.15-0.84 (m, 3H). MS (ESI+): 403.7 [M+H—H₂O]. HPLC (Method B): Rt. 4.8 min.

Example 27 [(1R)-1-[3-[ethyl-[4-(trifluoromethyl)benzoyl]amino]propanoylamino]-2-(4-fluorophenyl)ethyl]boronic acid (Compound No. 27)

1H NMR (500 MHz, DMSO-d6) ppm=7.80-7.72 (m, 2H), 7.54-7.45 (m, 2H), 7.21-7.03 (m, 2H), 7.02-6.89 (m, 2H), 3.56-3.31 (m, 2H), 3.27-2.94 (m, 3H), 2.82-2.53 (m, 2H), 2.44-2.22 (m, 2H), 1.13-0.87 (m, 3H). MS (ESI+): 437.2 [M+H—H₂O]. HPLC (Method B): Rt. 5.1 min.

Example 28 [(1R)-1-[3-[(4-cyanobenzoyl)-ethyl-amino]propanoylamino]-2-(4-fluorophenyl)ethyl]boronic acid (Compound No. 28)

1H NMR (500 MHz, DMSO-d6) ppm=7.88-7.79 (m, 2H), 7.49-7.42 (m, 2H), 7.21-7.04 (m, 2H), 7.02-6.90 (m, 2H), 3.55-3.47 (m, 1H), 3.39-3.31 (m, 1H), 3.25-3.17 (m, 1H), 3.15-3.05 (m, 1H), 3.01-2.94 (m, 1H), 2.81-2.71 (m, 1H), 2.66-2.53 (m, 1H), 2.45-2.33 (m, 1H), 2.29-2.21 (m, 1H), 1.12-0.86 (m, 3H). MS (ESI+): 394.2 [M+H—H₂O]. HPLC (Method B): Rt. 4.25 min.

Example 29 [(1R)-2-(2,4-dimethylphenyl)-1-[[2-[ethyl(o-tolylsulfonyl)amino]acetyl]-amino]ethyl]boronic acid (Compound No. 29)

1H NMR (500 MHz, DMSO-d6) ppm=7.85-7.81 (m, 1H), 7.53-7.47 (m, 1H), 7.40-7.32 (m, 2H), 6.90 (d, J=7.7, 1H), 6.88-6.85 (m, 1H), 6.83-6.78 (m, 1H), 3.85-3.71 (m, 2H), 3.26-3.19 (m, 1H), 3.17-3.08 (m, 1H), 3.08-3.00 (m, 1H), 2.75 (dd, J=14.1, 5.9, 1H), 2.58 (dd, J=14.1, 9.2, 1H), 2.48 (s, 3H), 2.17 (s, 3H), 2.16 (s, 3H), 0.89 (t, J=7.1, 3H). MS (ESI+): 415.3 [M+H—H₂O]. HPLC (Method B): Rt. 5.5 min.

Example 30 [(1R)-2-(2,4-dimethylphenyl)-1-[[2-[(ethyl(p-tolylsulfonyl)amino]acetyl]-amino]ethyl]boronic acid (Compound No. 30)

1H NMR (500 MHz, DMSO-d6) ppm=7.66-7.61 (m, 2H), 7.38-7.33 (m, 2H), 6.94 (d, J=7.7, 1H), 6.90-6.86 (m, 1H), 6.85-6.80 (m, 1H), 3.70-3.57 (m, 2H), 3.26 (dd, J=8.8, 6.1, 1H), 3.06-2.94 (m, 2H), 2.77 (dd, J=14.1, 6.0, 1H), 2.62 (dd, J=14.1, 8.9, 1H), 2.35 (s, 3H), 2.19 (s, 3H), 2.17 (s, 3H), 0.85 (t, J=7.2, 3H). MS (ESI+): 415.3

[M+H—H₂O]. HPLC (Method B): Rt. 5.6 min.

Example 31 [(1R)-2-(2,4-dimethylphenyl)-1-[[2-[ethyl(m-tolylsulfonyl)amino]acetyl]-amino]ethyl]boronic acid (Compound No. 31)

1H NMR (500 MHz, DMSO-d6) ppm=7.59-7.52 (m, 2H), 7.48-7.42 (m, 2H), 6.94 (d, J=7.7, 1H), 6.90-6.86 (m, 1H), 6.85-6.80 (m, 1H), 3.72-3.57 (m, 2H), 3.26 (dd, J=8.8, 6.1, 1H), 3.07-2.95 (m, 2H), 2.77 (dd, J=14.1, 6.1, 1H), 2.62 (dd, J=14.1, 8.8, 1H), 2.35 (s, 3H), 2.19 (s, 3H), 2.17 (s, 3H), 0.86 (t, J=7.1, 3H). MS (ESI+): 415.3 [M+H—H₂O]. HPLC (Method B): Rt. 5.6 min.

Example 32 [(1R)-2-(2,4-dimethylphenyl)-1-[[2-[methyl(p-tolylsulfonyl)amino]-acetyl]amino]ethyl]boronic acid (Compound No. 32)

1H NMR (500 MHz, DMSO-d6) ppm=7.62-7.58 (m, 2H), 7.42-7.37 (m, 2H), 6.93 (d, J=7.7, 1H), 6.90-6.87 (m, 1H), 6.84-6.80 (m, 1H), 3.51-3.41 (m, 2H), 3.24 (dd, J=9.1, 5.9, 1H), 2.76 (dd, J=14.1, 5.8, 1H), 2.62 (dd, J=14.1, 9.2, 1H), 2.52-2.47 (m, 3H), 2.36 (s, 3H), 2.18 (s, 3H), 2.16 (s, 3H). MS (ESI+): 401.3 [M+H—H₂O]. HPLC (Method B): Rt. 5.4 min.

Example 33 [(1R)-2-(2,4-dimethylphenyl)-1-[[2-[isopropyl(p-tolylsulfonyl)amino]-acetyl]amino]ethyl]boronic acid (Compound No. 33)

1H NMR (400 MHz, DMSO-d6) ppm=7.77-7.72 (m, 2H), 7.45-7.39 (m, 2H), 7.02 (d, J=7.6, 1H), 6.96-6.93 (m, 1H), 6.92-6.87 (m, 1H), 3.87 (p, J=6.6, 1H), 3.74-3.60 (m, 2H), 3.30 (dd, J=8.5, 6.3, 1H), 2.83 (dd, J=14.1, 6.2, 1H), 2.70 (dd, J=14.1, 8.5, 1H), 2.40 (s, 3H), 2.24 (s, 3H), 2.21 (s, 3H), 0.82 (t, J=6.9, 6H). MS (ESI+): 429.4 [M+H—H₂O]. HPLC (Method B): Rt. 5.7 min.

Example 34 [(1R)-2-(2,4-dimethylphenyl)-1-[[2-(N-propanoylanilino)acetyl]amino]-ethyl]boronic acid (Compound No. 34)

1H NMR (400 MHz, DMSO-d6) ppm=7.41-7.29 (m, 3H), 7.20-7.11 (m, 2H), 6.89-6.85 (m, 1H), 6.82 (d, J=7.7, 1H), 6.79-6.73 (m, 1H), 4.10 (s, 2H), 3.17-3.08 (m, 1H), 2.72 (dd, J=14.2, 5.8, 1H), 2.57 (dd, J=14.2, 9.2, 1H), 2.15 (s, 3H), 2.12 (s, 3H), 2.03-1.91 (m, 2H), 0.86 (t, J=7.4, 3H). MS (ESI+): 365 [M+H—H₂O]. HPLC 19/533 EliteLa Chrom 70173815;Waters XBridge C8 3.5 μm 4.6×50 mm-8.1 min; 2 mL/min; 215 nm; buffer A: 0.05% TFA/H2O; buffer B: 0.04% TFA/ACN; 0.0-0.2 min 5% buffer B; 0.2-8.1 min 5%-100% buffer B; 8.1-10.0 min 100%-5% buffer B; Rt: 4.67 min.

Example 35 [(1R)-1-[[2-[N-(benzenesulfonyl)anilino]acetyl]amino]-2-(2,4-dimethylphenyl)ethyl]boronic acid (Compound No. 35)

1H NMR (400 MHz, DMSO-d6/D2O) ppm=7.75-7.67 (m, 1H), 7.62-7.54 (m, 4H), 7.34-7.25 (m, 3H), 7.05-6.99 (m, 2H), 6.90 (s, 1H), 6.84-6.76 (m, 2H), 4.26-4.14 (m, 2H), 3.18 (dd, J=8.5, 6.0 Hz, 1H), 2.75 (dd, J=14.1, 6.0 Hz, 1H), 2.62-2.54 (m, 1H), 2.21 (s, 3H), 2.14 (s, 3H). MS (ESI+): 449 [M+H—H₂O]. HPLC A19/533 EliteLa Chrom 70173815;Waters XBridge C8 3.5 μm 4.6×50 mm-8.1 min; 2 mL/min; 215 nm; buffer A: 0.05% TFA/H2O; buffer B: 0.04% TFA/ACN; 0.0-0.2 min 5% buffer B; 0.2-8.1 min 5%-100% buffer B; 8.1-10.0 min 100%-5% buffer B; Rt: 5.71 min.

Example 36 [(1R)-2-(2,4-dimethylphenyl)-1-[[2-[ethyl-(2-methylsulfanylacetyl)-amino]acetyl]amino]ethyl]boronic acid (Compound No. 36)

1H NMR (400 MHz, DMSO-d6) ? 6.96-6.90 (m, 1H), 6.90-6.86 (m, 1H), 6.86-6.80 (m, 1H), 3.87-3.69 (m, 2H), 3.36-3.00 (m, 5H), 2.82-2.72 (m, 1H), 2.66-2.56 (m, 1H), 2.22-2.18 (m, 3H), 2.18-2.15 (m, 3H), 2.07-1.98 (m, 3H), 1.07-0.83 (m, 3H). MS (ESI+): 349,1 [M+H—H₂O]. HPLC A19/533 EliteLa Chrom 70173815;Waters XBridge C8 3.5 μm 4.6×50 mm-8.1 min; 2 mL/min; 215 nm; buffer A: 0.05% TFA/H2O; buffer B: 0.04% TFA/ACN; 0.0-0.2 min 5% buffer B; 0.2-8.1 min 5%-100% buffer B; 8.1-10.0 min 100%-5% buffer B; Rt: 4.45 min.

Example 37 [(1R)-1-[[2-[(2-chloroacetyl)-ethyl-amino]acetyl]amino]-2-(2,4-dimethylphenyl)ethyl]boronic acid (Compound No. 37)

1H NMR (400 MHz, DMSO-d6/D2O) ppm=6.96-6.90 (m, 1H), 6.90-6.86 (m, 1H), 6.86-6.80 (m, 1H), 4.35-3.95 (m, 2H), 3.90-3.72 (m, 2H), 3.35-3.05 (m, 3H), 2.83-2.70 (m, 1H), 2.65-2.54 (m, 1H), 2.24-2.13 (m, 6H), 1.06-0.84 (m, 3H).MS (ESI+): 337,1 [M+H—H₂O]. HPLC A19/533 EliteLa Chrom 70173815;Waters XBridge C8 3.5 μm 4.6×50 mm-8.1 min; 2 mL/min; 215 nm; buffer A: 0.05% TFA/H2O; buffer B: 0.04% TFA/ACN; 0.0-0.2 min 5% buffer B; 0.2-8.1 min 5%-100% buffer B; 8.1-10.0 min 100%-5% buffer B; Rt: 4.36 min.

Example 38 [(1R)-2-(benzofuran-3-yl)-1-[[3-(dimethylamino)-3-oxo-2-phenyl-propanoyl]amino]ethyl]boronic acid (Compound No. 38)

1H NMR (400 MHz, DMSO-d6/D2O) ppm=7.51 (d, J=7.8 Hz, 1H), 7.45 (d, J=7.9 Hz, 1H), 7.40, 7.33 (2×s, 1H, ratio 1:1, mixture of rotamers/diastereomers), 7.30-7.06 (m, 7H), 4.81, 4.78 (2×s, 1H, ratio 1:1, mixture of rotamers/diastereomers), 3.40-3.27, 3.27-3.15 (2×m, 1H, ratio 1:1, mixture of rotamers/diastereomers), 2.97-2.67 (m, 8H). MS (ESI+): 377.2 [M+H—H₂O]. HPLC A19/533 EliteLa Chrom 70173815;Waters XBridge C8 3.5 μm 4.6×50 mm-8.1 min; 2 mL/min; 215 nm; buffer A: 0.05% TFA/H2O; buffer B: 0.04% TFA/ACN; 0.0-0.2 min 5% buffer B; 0.2-8.1 min 5%-100% buffer B; 8.1-10.0 min 100%-5% buffer B; Rt: 4.43 min.

Example 39 [(1R)-1-[[2-(2-fluoro-N-propanoyl-anilino)acetyl]amino]-2-(3-thienyl)ethyl]boronic acid (Compound No. 39)

1H NMR (400 MHz, DMSO-d6, TE=363K) d 7.53-7.17 (m, 5H), 7.00 (s, 1H), 6.91 (d, J=4.7 Hz, 1H), 4.16 (s, br, 2H), 3.40-3.22 (m, 1H), 2.88 (dd, J=14.5, 5.6 Hz, 1H), 2.78 (dd, J=14.5, 8.0 Hz, 1H), 2.07 (s, br, 2H), 0.96 (t, J=7.4 Hz, 3H). MS (ESI+): 361.2 [M+H—H₂O]. HPLC A19/533 EliteLa Chrom 70173815;Waters XBridge C8 3.5 μm 4.6×50 mm-8.1 min; 2 mL/min; 215 nm; buffer A: 0.05% TFA/H2O; buffer B: 0.04% TFA/ACN; 0.0-0.2 min 5% buffer B; 0.2-8.1 min 5%-100% buffer B; 8.1-10.0 min 100%-5% buffer B; Rt: 4.49 min.

Example 40 [(1R)-1-[[2-[methyl-[2-(trifluoromethyl)benzoyl]amino]acetyl]amino]-2-(3-thienyl)ethyl]boronic acid (Compound No. 40)

1H NMR (400 MHz, T=363K, DMSO-d6 /D20, mixture of rotamers) d 7.79-7.68, 7.68-7.57 (2×m, 3H), 7.43-7.34 (m, 1H), 7.34-7.24 (m, 1H), 7.10-7.05, 6.98-6.94, 6.89-6.82 (3×m, 2H), 4.14-3.97, 3.68-3.53 (2×m, 2H), 3.40-3.24 (m, 1H), 2.97-2.61 (m, 5H). MS (ESI+): 397.1 [M+H—H₂O]. HPLC A19/533 EliteLa Chrom 70173815;Waters XBridge C8 3.5 μm 4.6×50 mm-8.1 min; 2 mL/min; 215 nm; buffer A: 0.05% TFA/H2O; buffer B: 0.04% TFA/ACN; 0.0-0.2 min 5% buffer B; 0.2-8.1 min 5%-100% buffer B; 8.1-10.0 min 100%-5% buffer B; Rt: 4.40 min.

Example 41 [(1R)-2-[(3S)-2,3-dihydrobenzofuran-3-yl]-1-[[2-[isopropyl(p-tolylsulfonyl)amino]acetyl]amino]ethyl]boronic acid (Compound No. 41)

1H NMR (500 MHz, DMSO-d6/D2O) d 7.77-7.72 (m, 2H), 7.40-7.35 (m, 2H), 7.11 (d, J=7.3 Hz, 1H), 7.08-7.03 (m, 1H), 6.84-6.78 (m, 1H), 6.70 (d, J=7.9 Hz, 1H), 4.52 (t, J=8.9 Hz, 1H), 4.21 (dd, J=9.0, 6.8 Hz, 1H), 3.93-3.88 (m, 1H), 3.75-3.66 (m, 2H), 3.44-3.36 (m, 1H), 3.22 (dd, J=10.8, 4.0 Hz, 1H), 2.34 (s, 3H), 1.91-1.84 (m, 1H), 1.64-1.57 (m, 1H), 0.90 (d, J=6.7 Hz, 3H), 0.86 (d, J=6.7 Hz, 3H). MS (ESI+): 443.1 [M+H—H₂O]. Waters XBrigde C8 3.5 μm; 4.6×50 mm; EliteLa Chrom 70173815;8,1 min; 2ml/min; 215 nm; buffer A: 0.05% TFA/H2O; buffer B: 0.04% TFA/ACN; 0.0-0.2 min 5% buffer B; 0.2-8.5 min 5%-100% buffer B; 8.5-10.0 min 99%-5% buffer B; Rt: 5.32 min.

Example 42 [(1R)-1-[3-[(4-chlorobenzoyl)-ethyl-amino]propanoylamino]-2-[(3S)-2,3-dihydrobenzofuran-3-yl]ethyl]boronic acid (Compound No. 42)

1H NMR (500 MHz, DMSO-d6/D2O) d 7.45-7.37 (m, 2H), 7.36-7.29 (m, 2H), 7.14-7.11 (m, 1H), 7.09-7.04 (m, 1H), 6.83-6.78 (m, 1H), 6.71 (d, J=8.0 Hz, 1H), 4.56-4.42 (m, 1H), 4.20-4.10 (m, 1H), 3.65-3.22 (m, 4H), 3.18-3.08 (m, 1H), 3.01-2.91 (m, 1H), 2.49-2.33 (m, 2H), 1.90-1.74 (m, 1H), 1.61-1.50 (m, 1H), 1.15-0.90 (m, 3H). MS (ESI+): 427.2 [M+H—H₂O]. Waters XBrigde C8 3.5 μm; 4.6×50 mm; EliteLa Chrom 70173815;8,1 min; 2ml/min; 215 nm; buffer A: 0.05% TFA/H2O; buffer B: 0.04% TFA/ACN; 0.0-0.2 min 5% buffer B; 0.2-8.5 min 5%-100% buffer B; 8.5-10.0 min 99%-5% buffer B; Rt: 4.69 min.

Example 43 [(1R)-1-[[2-[ethyl(p-tolylsulfonyl)amino]acetyl]amino]-2-(7-methylbenzofuran-3-yl)ethyl]boronic acid (Compound 43)

1H NMR (500 MHz, DMSO-d6 +D2O) d 7.66-7.61 (m, 3H), 7.42 (d, J=7.3 Hz, 1H), 7.35 (d, J=8.1 Hz, 2H), 7.12 (t, J=7.4 Hz, 1H), 7.09 (d, J=7.1 Hz, 1H), 3.70 (d, J=16.9 Hz, 1H), 3.62 (d, J=16.9 Hz, 1H), 3.37 (dd, J=7.6, 5.6 Hz, 1H), 3.09-2.96 (m, 2H), 2.92 (dd, J=15.0, 5.2 Hz, 1H), 2.80 (dd, J=14.9, 7.7 Hz, 1H), 2.40 (s, 3H), 2.35 (s, 3H), 0.85 (t, J=7.2 Hz, 3H). MS (ESI+): 441.2 [M+H—H₂O]. HPLC A19/533 LaChromchiral 70079128;Waters XBridge C8 3.5 μm 4.6×50 mm-8.1 min; 2 mL/min; 215 nm; buffer A: 0.05% TFA/H2O; buffer B: 0.04% TFA/ACN; 0.0-0.2 min 5% buffer B; 0.2-8.1 min 5%-100% buffer B; 8.1-10.0 min 100%-5% buffer B; Rt: 5.01 min.

Example 44 Biological Activity

Determination of LMP7 Activity:

Measurement of LMP7 inhibition is performed in 384 well format based on fluorescence intensity assay.

Purified human immuno proteasome (0.25 nM) and serial diluted compounds in DMSO (range of concentrations from 30 μM to 15 μM) or controls are incubated for 20 minutes or 120 minutes (long incubation) at 25° C. in assay buffer containing 50 mM Tris pH 7.4, 0.03% SDS, 1 mM EDTA and 1% DMSO. The reaction is initiated by the addition of the fluorogenic peptide substrate, Suc-LLVY-AMC (Bachem 1-1395), at a concentration of 40 μM. After 60 minutes of incubation at 37° C., fluorescence intensity is measured at λ_(ex)=350 nm and λ_(em)=450 nm with a fluorescence reader (Perkin Elmer Envision reader or equivalent).

The LMP7 activity of the compounds is summarized in Table 1. Unless indicated otherwise the results are obtained after incubation for 20 minutes.

Determination of Beta5 Activity:

Measurement of Beta5 inhibition is performed in 384 well format based on fluorescence intensity assay.

Purified human constitutive proteasome (1.25 nM) and serial diluted compounds in DMSO (range of concentrations from 30 μM to 15 μM) or controls are incubated for 20 minutes or 120 minutes (long incubation) at 25° C. in assay buffer containing 50 mM Tris pH 7.4, 0.03% SDS, 1 mM EDTA and 1% DMSO. The reaction is initiated by the addition of the fluorogenic peptide substrate, Suc-LLVY-AMC (Bachem 1-1395), at a concentration of 40 μM. After 60 minutes of incubation at 37° C., fluorescence intensity is measured at λ_(ex)=350 nm and λ_(em)=450 nm with a fluorescence reader (Perkin Elmer Envision reader or equivalent).

Table 2 shows exemplarily the Beta5 activity of the some compounds according to the invention and their selectivity to LMP7 versus Beta5. Unless indicated otherwise the results are obtained after incubation for 20 minutes.

TABLE 1 Compound LMP7 No. Name IC50 (M) 1 [(1R)-1-[3-(N-acetylanilino)propanoylamino]-2-phenyl- *** ethyl]boronic acid 2 [(1R)-1-[3-(N-ethylsulfonylanilino)propanoylamino]-2- **** (p-tolyl)ethyl]boronic acid 3 [(1R)-1-[3-(N-methylsulfonylanilino)-propanoylamino]- **** 2-(p-tolyl)ethyl]boronic acid 4 [(1R)-1-[3-(benzenesulfonyl)propanoylamino]-2- **** (benzofuran-3-yl)ethyl]boronic acid 5 [(1R)-1-[3- **** [benzenesulfonyl(ethyl)amino]propanoylamino]-2-(p- tolyl)ethyl]boronic acid 6 [(1R)-1-[3- **** [benzenesulfonyl(isopropyl)amino]propanoylamino]-2- (p-tolyl)ethyl]boronic acid 7 [(1R)-1-[3- **** [benzenesulfonyl(methyl)amino]propanoylamino]-2- (p-tolyl)ethyl]boronic acid 8 [(1R)-1-[3-[benzoyl(ethyl)amino]propanoylamino]-2- *** phenyl-ethyl]boronic acid 9 [(1R)-1-[3-[benzoyl(isopropyl)amino]propanoylamino]- *** 2-phenyl-ethyl]boronic acid 10 [(1R)-1-[3-[benzoyl(methyl)amino]propanoylamino]-2- *** phenyl-ethyl]boronic acid 11 [(1R)-1-[3-[ethyl(ethylsulfonyl)amino]- **** propanoylamino]-2-(p-tolyl)ethyl]boronic acid 12 [(1R)-1-[3-[ethyl-(2-methylbenzoyl)amino]- *** propanoylamino]-2-phenyl-ethyl]boronic acid 13 [(1R)-1-[3-[ethyl-(3-methylbenzoyl)amino]- *** propanoylamino]-2-phenyl-ethyl]boronic acid 14 [(1R)-1-[3-[ethyl-(4-methylbenzoyl)amino]- **** propanoylamino]-2-phenyl-ethyl]boronic acid 15 [(1R)-1-[3-[isopropyl(methylsulfonyl)amino]- *** propanoylamino]-2-(p-tolyl)ethyl]boronic acid 16 [(1R)-1-[[2-[benzenesulfonyl(ethyl)amino]- **** acetyl]amino]-2-(p-tolyl)ethyl]boronic acid 17 [(1R)-1-[[2-[benzoyl(ethyl)amino]-acetyl]amino]-2- *** phenyl-ethyl]boronic acid 18 [(1R)-1-[[5-(dimethylamino)-5-oxo-pentanoyl]amino]- ** 2-(3-ethylphenyl)ethyl]boronic acid 19 [(1R)-2-(2,4-dimethylphenyl)-1-[3-[ethyl-(4- **** methylbenzoyl)amino]-propanoylamino]-ethyl]boronic acid 20 [(1R)-2-(3-ethylphenyl)-1-(3- *** methylsulfonylpropanoylamino)ethyl]-boronic acid 21 [(1R)-2-(3-ethylphenyl)-1-(4- *** methylsulfonylbutanoylamino)ethyl]-boronic acid 22 [(1R)-2-(3-ethylphenyl)-1-(5- *** methylsulfonylpentanoylamino)ethyl]-boronic acid 23 [(1R)-2-(benzofuran-3-yl)-1-(3- **** methylsulfonylpropanoylamino)ethyl]-boronic acid 24 [(1R)-2-(2,4-dimethylphenyl)-1-[[2- *** [ethyl(propanoyl)amino]acetyl]amino]ethyl]boronic acid 25 [(1R)-1-[3-[ethyl-(4- **** methoxybenzoyl)amino]propanoylamino]-2-(4- fluorophenyl)ethyl]boronic acid 26 [(1R)-1-[3-[(4-chlorobenzoyl)-ethyl- **** amino]propanoylamino]-2-(4- fluorophenyl)ethyl]boronic acid 27 [(1R)-1-[3-[ethyl-[4- **** (trifluoromethyl)benzoyl]amino]propanoylamino]-2-(4- fluorophenyl)ethyl]boronic acid 28 [(1R)-1-[3-[(4-cyanobenzoyl)-ethyl- **** amino]propanoylamino]-2-(4- fluorophenyl)ethyl]boronic acid 29 [(1R)-2-(2,4-dimethylphenyl)-1-[[2-[ethyl(o- **** tolylsulfonyl)amino]acetyl]amino]ethyl]boronic acid 30 [(1R)-2-(2,4-dimethylphenyl)-1-[[2-[ethyl(p- **** tolylsulfonyl)amino]acetyl]amino]ethyl]boronic acid 31 [(1R)-2-(2,4-dimethylphenyl)-1-[[2-[ethyl(m- **** tolylsulfonyl)amino]acetyl]amino]ethyl]boronic acid 32 [(1R)-2-(2,4-dimethylphenyl)-1-[[2-[methyl(p- **** tolylsulfonyl)amino]acetyl]amino]ethyl]boronic acid 33 [(1R)-2-(2,4-dimethylphenyl)-1-[[2-[isopropyl(p- **** tolylsulfonyl)amino]acetyl]amino]ethyl]boronic acid 34 [(1R)-2-(2,4-dimethylphenyl)-1-[[2-(N- **** propanoylanilino)acetyl]amino]ethyl]boronic acid 35 [(1R)-1-[[2-[N-(benzenesulfonyl)anilino]acetyl]amino]- **** 2-(2,4-dimethylphenyl)ethyl]boronic acid 36 [(1R)-2-(2,4-dimethylphenyl)-1-[[2-[ethyl-(2- *** methylsulfanylacetyl)amino]acetyl]amino]ethyl]boronic acid 37 [(1R)-1-[[2-[(2-chloroacetyl)-ethyl- *** amino]acetyl]amino]-2-(2,4- dimethylphenyl)ethyl]boronic acid 38 [(1R)-2-(benzofuran-3-yl)-1-[[3-(dimethylamino)-3- **** oxo-2-phenyl-propanoyl]amino]ethyl]boronic acid 39 [(1R)-1-[[2-(2-fluoro-N-propanoyl- ** anilino)acetyl]amino]-2-(3-thienyl)ethyl]boronic acid 40 [(1R)-1-[[2-[methyl-[2- ** (trifluoromethyl)benzoyl]amino]acetyl]amino]-2-(3- (long thienyl)ethyl]boronic acid incubation) 41 [(1R)-2-[(3S)-2,3-dihydrobenzofuran-3-yl]-1-[[2- **** [isopropyl(p- (long tolylsulfonyl)amino]acetyl]amino]ethyl]boronic acid incubation) 42 [(1R)-1-[3-[(4-chlorobenzoyl)-ethyl- **** amino]propanoylamino]-2-[(3S)-2,3- (long dihydrobenzofuran-3-yl]ethyl]boronic acid incubation) 43 [(1R)-1-[[2-[ethyl(p-tolylsulfonyl)amino]acetyl]amino]- *** 2-(7-methylbenzofuran-3-yl)ethyl]boronic acid (long incubation) * IC₅₀ > 5 μM, ** 0.5 μM < IC₅₀ < 5 μM, *** 0.05 μM < IC₅₀ < 0.5 μM, **** IC₅₀ < 0.05 μM; in accordance with the method described above, “long incubation” means that the sample is incubated for 120 min.

TABLE 2 Compound Beta5 IC50 Selectivity No. Name (M) LMP7 vs Beta5 3 [(1R)-1-[3-(N-methylsulfonylanilino)- *** +++ propanoylamino]-2-(p-tolyl)ethyl]boronic acid 4 [(1R)-1-[3-(benzenesulfonyl)propanoylamino]-2- **** +++ (benzofuran-3-yl)ethyl]boronic acid 8 [(1R)-1-[3-[benzoyl(ethyl)amino]propanoylamino]- ** +++ 2-phenyl-ethyl]boronic acid 9 [(1R)-1-[3- ** +++ [benzoyl(isopropyl)amino]propanoylamino]-2- phenyl-ethyl]boronic acid 14 [(1R)-1-[3-[ethyl-(4-methylbenzoyl)amino]- ** +++ propanoylamino]-2-phenyl-ethyl]boronic acid 16 [(1R)-1-[[2-[benzenesulfonyl(ethyl)amino]- *** +++ acetyl]amino]-2-(p-tolyl)ethyl]boronic acid 18 [(1R)-1-[[5-(dimethylamino)-5-oxo- * +++ pentanoyl]amino]-2-(3-ethylphenyl)ethyl]boronic acid 19 [(1R)-2-(2,4-dimethylphenyl)-1-[3-[ethyl-(4- ** +++++ methylbenzoyl)amino]-propanoylamino]- ethyl]boronic acid 20 [(1R)-2-(3-ethylphenyl)-1-(3- ** +++ methylsulfonylpropanoylamino)ethyl]-boronic acid 21 [(1R)-2-(3-ethylphenyl)-1-(4- * +++ methylsulfonylbutanoylamino)ethyl]-boronic acid 24 [(1R)-2-(2,4-dimethylphenyl)-1-[[2- * +++++ [ethyl(propanoyl)amino]acetyl]amino]ethyl]boronic acid 25 [(1R)-1-[3-[ethyl-(4- ** ++++ methoxybenzoyl)amino]propanoylamino]-2-(4- flucrophenyl)ethyl]boronic acid 26 [(1R)-1-[3-[(4-chlorobenzoyl)-ethyl- *** ++++ amino]propanoylamino]-2-(4-fluorophenyl)ethyl]boronic acid 27 [(1R)-1-[3-[ethyl-[4- *** +++ (trifluoromethyl)benzoyl]amino]propanoylamino]-2-(4- fluorophenyl)ethyl]boronic acid 28 [(1R)-1-[3-[(4-cyanobenzoyl)-ethyl- ** ++++ amino]propanoylamino]-2-(4-fluorophenyl)ethyl]boronic acid 29 [(1R)-2-(2,4-dimethylphenyl)-1-[[2-[ethyl(o- ** +++++ tolylsulfonyl)amino]acetyl]amino]ethyl]boronic acid 30 [(1R)-2-(2,4-dimethylphenyl)-1-[[2-[ethyl(p- ** +++++ tolylsulfonyl)amino]acetyl]amino]ethyl]boronic acid 31 [(1R)-2-(2,4-dimethylphenyl)-1-[[2-[ethyl(m- *** ++++ tolylsulfonyl)amino]acetyl]amino]ethyl]boronic acid 32 [(1R)-2-(2,4-dimethylphenyl)-1-[[2-[methyl(p- *** +++++ tolylsulfonyl)amino]acetyl]amino]ethyl]boronic acid 33 [(1R)-2-(2,4-dimethylphenyl)-1-[[2-[isopropyl(p- ** +++++ tolylsulfonyl)amino]acetyl]amino]ethyl]boronic acid 34 [(1R)-2-(2,4-dimethylphenyl)-1-[[2-(N- ** +++++ propanoylanilino)acetyl]amino]ethyl]boronic acid 35 [(1R)-1-[[2-[N- *** ++++ (benzenesulfonyl)anilino]acetyl]amino]-2-(2,4- dimethylphenyl)ethyl]boronic acid 36 [(1R)-2-(2,4-dimethylphenyl)-1-[[2-[ethyl-(2- * ++++ methylsulfanylacetyl)amino]acetyl]amino]ethyl]boronic acid 37 [(1R)-1-[[2-[(2-chloroacetyl)-ethyl- * +++ amino]acetyl]amino]-2-(2,4- dimethylphenyl)ethyl]boronic acid 38 [(1R)-2-(benzofuran-3-yl)-1-[[3-(dimethylamino)-3- ** +++++ oxo-2-phenyl-propanoyl]amino]ethyl]boronic acid 39 [(1R)-1-[[2-(2-fluoro-N-propanoyl- * +++ anilino)acetyl]amino]-2-(3-thienyl)ethyl]boronic acid 40 [(1R)-1-[[2-[methyl-[2- * ++ (trifluoromethyl)benzoyl]amino]acetyl]amino]-2-(3- (long (long thienyl)ethyl]boronic acid incubation) incubation) 41 [(1R)-2-[(3S)-2,3-dihydrobenzofuran-3-yl]-1-[[2- ** +++++ [isopropyl(p- (long (long tolylsulfonyl)amino]acetyl]amino]ethyl]boronic acid incubation) incubation) 42 [(1R)-1-[3-[(4-chlorobenzoyl)-ethyl- *** +++++ amino]propanoylamino]-2-[(3S)-2,3- (long (long dihydrobenzofuran-3-yl]ethyl]boronic acid incubation) incubation) 43 [(1R)-1-[[2-[ethyl(p- * +++++ tolylsulfonyl)amino]acetyl]amino]-2-(7- (long (long methylbenzofuran-3-yl)ethyl]boronic acid incubation) incubation) * IC₅₀ > 5 μM, ** 0.5 μM < IC₅₀ < 5 μM, *** 0.05 μM < IC₅₀ < 0.5 μM, **** IC₅₀ < 0.05 μM, +: Selectivity < 10, +: 10 < Selectivity < 30, +++: 30 ≤ Selectivity < 50, ++++: 50 ≤ Selectivity < 70, +++++: Selectivity ≥ 70, n.d: not determined; in accordance with the method described above, “long incubation” means that the sample is incubated for 120 min.

The following examples relate to medicaments:

Example A Injection Vials

A solution of 100 g of an active ingredient of the formula I and 5 g of disodium hydrogenphosphate in 3 I of bidistilled water is adjusted to pH 6.5 using 2 N hydrochloric acid, sterile filtered, transferred into injection vials, lyophilised under sterile conditions and sealed under sterile conditions. Each injection vial contains 5 mg of active ingredient.

Example B Suppositories

A mixture of 20 g of an active ingredient of the formula I with 100 g of soya lecithin and 1400 g of cocoa butter is melted, poured into moulds and allowed to cool. Each suppository contains 20 mg of active ingredient.

Example C Solution

A solution is prepared from 1 g of an active ingredient of the formula I, 9.38 g of NaH₂PO₄.2 H₂O, 28.48 g of Na₂HPO₄.12 H₂O and 0.1 g of benzalkonium chloride in 940 ml of bidistilled water. The pH is adjusted to 6.8, and the solution is made up to 1 I and sterilised by irradiation. This solution can be used in the form of eye drops.

Example D Ointment

500 mg of an active ingredient of the formula I are mixed with 99.5 g of Vaseline under aseptic conditions.

Example E Tablets

A mixture of 1 kg of active ingredient of the formula I, 4 kg of lactose, 1.2 kg of potato starch, 0.2 kg of talc and 0.1 kg of magnesium stearate is pressed in a conventional manner to give tablets in such a way that each tablet contains 10 mg of active ingredient.

Example F Dragees

Tablets are pressed analogously to Example E and subsequently coated in a conventional manner with a coating of sucrose, potato starch, talc, tragacanth and dye.

Example G Capsules

2 kg of active ingredient of the formula I are introduced into hard gelatine capsules in a conventional manner in such a way that each capsule contains 20 mg of the active ingredient.

Example H Ampoules

A solution of 1 kg of active ingredient of the formula I in 60 I of bidistilled water is sterile filtered, transferred into ampoules, lyophilised under sterile conditions and sealed under sterile conditions. Each ampoule contains 10 mg of active ingredient. 

1-21. (canceled)
 22. A compound of formula (I)

wherein: LX denotes (CH₂)_(n), wherein 1 to 5 H atoms may be replaced by Hal, R^(3a), OH, OR^(3a), C3-C6-cycloalkyl, Ar1 and/or Het1, and/or wherein 1 or 2 non-adjacent CH₂ groups may be replaced by C3-C6-cycloalkyl, O, SO and/or SO₂; LY denotes (CH₂)_(m), wherein 1 to 5 H atoms may be replaced by Hal, R^(3b), OH and/or OR^(3b), and/or wherein 1 or 2 non-adjacent CH₂ groups may be replaced by O, SO and/or SO₂; X denotes NR^(4a)COR^(4b), CONR^(5a)R^(5b), SO₂R⁶, SO₂NR^(7a)R^(7b), SO₂NHR⁸, SO₂R^(9a)NR^(9b)COR^(9c), NR^(10a)SO₂R^(10b) or NHSO₂R¹¹; Y denotes OR^(3c) or Cyc; R¹, R² denote each, independently from one another, H or C1-C6-alkyl, or R¹ and R² form together a residue according to formula (CE)

R^(3a), R^(3b), R^(3c) denote each, independently from one another, linear or branched C1-C6-alkyl, wherein 1 to 5 H atoms may be replaced by Hal, OH and/or OAlk; R^(4a), R^(4b), R^(5a), R^(5b), R⁶, R^(7a), R^(7b), R⁸, R^(9a), R^(9b), R^(9c), R^(10a), R^(10b) and R¹¹ denote each, independently from one another, Ar1, Het1 or A; or R^(5a) and R^(5b) and/or R^(7a) and R^(7b) form together a C3-C6-cycloalkyl residue; A denotes linear or branched C1-C6-alkyl, C3-C6-cycloalkyl, each unsubstituted or mono-, di-, tri- or tetrasubstituted by Hal, CN, R^(3a), SR^(3a), OR^(3a), Ar1, Het1, and/or (CH₂)_(q)—Z; Alk denotes linear or branched C1-C6-alkyl; Ar1 denotes phenyl, which is unsubstituted, mono-, bi- or trisubstituted by Hal, NO₂, CN, R^(3a), OR^(3a), CONHR^(3a), NR^(3a)COR^(3b), SO₂R^(3a), SOR^(3a), NH₂, NHR^(3a), N(R^(3a))₂, Ar2, Het2 and/or (CH₂)_(q)—Z; Het1 denotes saturated, unsaturated or aromatic 5- or 6-membered heterocycle having 1 to 4 N, O and/or S atoms, wherein each heterocycle may each be unsubstituted or mono-, di-, tri-, tetra- or pentasubstituted by Hal, NO₂, CN, R^(3a), OR^(3a), CONHR^(3a), NR^(3a)COR^(3b), SO₂R^(3a), SOR^(3a), NH₂, NHR^(3a), N(R^(3a))₂, Ar2, Het2 and/or (CH₂)_(q)—Z; Cyc denotes a mono- or bicyclic, 4-, 5-, 6-, 7-, 8-, 9- or 10-membered hydrocarbon or heterocycle, each independently from one another unsubstituted or mono-, di-, tri-, tetra- or pentasubstituted by Hal, CN, R^(3a), OR^(3a), CONHR^(3a), CONR^(3b)R^(3a), CONH₂, NR^(3a)COR^(3b), SO₂R^(3a), SOR^(3a), NHR^(3a), N(R^(3a))₂, Ar2, Het2, (CH₂)_(q)—SR^(3a), (CH₂)_(q)—N(R^(3a))₂ and/or (CH₂)_(q)—Z, wherein the monocyclic hydrocarbon system is aromatic and at least one ring of the bicyclic hydrocarbon or heterocycle is aromatic, and wherein the heterocyclic system contains 1, 2 or 3 N and/or O and/or S atoms; Ar2 denotes phenyl, biphenyl or naphthyl each independently from one another unsubstituted or mono- or disubstituted by Hal, CN, R^(3a), OR^(3a), CONHR^(3a), NR^(3a)COR^(3b), SO₂R^(3a), SOR^(3a), NH₂, NHR^(3a), N(R^(3a))₂ and/or (CH₂)_(q)—Z; Het2 denotes a saturated, unsaturated or aromatic 5- or 6-membered heterocycle having 1 to 4 N, O and/or S atoms, which is unsubstituted or mono- or disubstituted by Hal, CN, R^(3a), OR^(3a), CONHR^(3a), NR^(3a)COR^(3b), SO₂R^(3a), SOR^(3a), NH₂, NHR^(3a), N(R^(3a))₂ and/or (CH₂)_(q)—Z; Z denotes OH, OR^(3a); n, q denote each, independently from one another, 1, 2, 3, 4, 5 or 6; m denotes 0, 1, 2, 3 or 4; Hal denotes F, Cl, Br or I; and derivatives, prodrugs, solvates, tautomers or stereoisomers thereof, as well as the physiologically acceptable salts of each of the foregoing, including mixtures thereof in all ratios; with the provisio that compound (R)-(2-(benzofuran-3-yl)-1-(2-(N-methylmethyl sulfonamido) acetamido)ethyl)boronic acid is excluded.
 23. The compound according to claim 22, wherein Y denotes Cyc and derivatives, prodrugs, solvates, tautomers or stereoisomers thereof, as well as the physiologically acceptable salts of each of the foregoing, including mixtures thereof in all ratios; with the provisio that compound (R)-(2-(benzofuran-3-yl)-1-(2-(N-methylmethylsulfonamido) acetamido)ethyl)boronic acid is excluded.
 24. The compound according to claim 22, wherein Cyc denotes phenyl, which is unsubstituted, mono-, di- or trisubstituted by Hal, CN, R^(3a), OR^(3a), CONHR^(3a), CONR^(3b)R^(3a), CONH₂, NR^(3a)COR^(3b), SO₂R^(3a), SOR^(3a), NHR^(3a), N(R^(3a))₂, Ar2, Het2 ,(CH₂)_(q)—SR^(3a), (CH₂)_(q)—N(R^(3a))₂ and/or (CH₂)_(q)—Z; or 1- or 2-naphthyl, 4- or 5- indanyl, 1-, 2-, 4-, 5- or 6- azulenyl, 1- or 2-tetrahydronaphthalin 5- or 6-yl, 2- or 3-furyl, 2- or 3-thienyl, 2-, 3-, 4-, 5-, 6- or 7-benzofuryl, 2,3-dihydrobenzofuran-2- or 3-yl, 2-, 3-, 4-, 5-, 6- or 7-benzothiophenyl, benzodioxan-6- or 7-yl or 3,4-dihydro-1,5-benzodioxepin-6- or -7-yl, each, independently form one another, unsubstituted or mono-, di- or trisubstituted by Hal, CN, R^(3a), OR^(3a), CONHR^(3a), CONR^(3b)R^(3a), CONH₂, NR^(3a)COR^(3b), SO₂R^(3a), SOR^(3a), NHR^(3a), N(R^(3a))₂, Ar2, Het2 ,(CH₂)_(q)—SR^(3a), (CH₂)_(q)—N(R^(3a))₂ and/or (CH₂)_(q)—Z ; and derivatives, prodrugs, solvates, tautomers or stereoisomers thereof, as well as the physiologically acceptable salts of each of the foregoing, including mixtures thereof in all ratios; with the provisio that compound (R)-(2-(benzofuran-3-yl)-1-(2-(N-methylmethylsulfonamido) acetamido)ethyl)boronic acid is excluded.
 25. The compound according to claim 22, wherein: R1, R2 denote H or C1-C4-alkyl, or R¹ and R² form together a residue according to formula (CE)

and A denotes linear or branched C1-C6-alkyl, each unsubstituted or mono-, di-, tri- or tetrasubstituted by Hal, CN, R^(3a), SR^(3a) ,OR^(3a), Ar1, Het1, and/or (CH₂)_(q)—Z; n, q denote each, independently from one another, 1, 2, 3 or 4; and m denotes 1 or 2; and derivatives, prodrugs, solvates, tautomers or stereoisomers thereof, as well as the physiologically acceptable salts of each of the foregoing, including mixtures thereof in all ratios; with the provisio that compound (R)-(2-(benzofuran-3-yl)-1-(2-(N-methylmethylsulfonamido) acetamido)ethyl)boronic is excluded.
 26. The compound according to claim 22, wherein Cyc denotes 3-, 4-, 2,4-, 3,4-, or 2,3,4-substituted phenyl, wherein the substituents are selected from the group consisting of Hal, CN, R^(3a), OR^(3a), CONHR^(3a), CONR^(3b)R^(3a), CONH₂, NR^(3a)COR^(3b), SO₂R^(3a), SOR^(3a), NHR^(3a), N(R^(3a))₂, (CH₂)_(q)—SR^(3a), (CH₂)_(q)—N(R^(3a))₂ and/or (CH₂)_(q)—Z; or 1- or 2-naphthyl, 2- or 3-thienyl, 3-benzofuryl or 2,3-dihydrobenzofuran-3-yl, each independently from one another unsubstituted or mono-, di- or trisubstituted by Hal, CN, R^(3a), OR^(3a), CONHR^(3a), CONR^(3b)R^(3a), CONH₂, NR^(3a)COR^(3b), SO₂R^(3a), SOR^(3a), NHR^(3a), N(R^(3a))₂, (CH₂)_(q)—SR^(3a), (CH₂)_(q)—N(R^(3a))₂ and/or (CH₂)_(q)—Z; and derivatives, prodrugs, solvates, tautomers or stereoisomers thereof, as well as the physiologically acceptable salts of each of the foregoing, including mixtures thereof in all ratios; with the provisio that compound (R)-(2-(benzofuran-3-yl)-1-(2-(N-methylmethylsulfonamido) acetamido)ethyl)boronic acid is excluded.
 27. The compound according to claim 26, wherein Cyc denotes: 2,4-, 3,4-, or 2,3,4-substituted phenyl, wherein the substituents are selected from the group consisting of Hal, CN, R^(3a), OR^(3a), CONHR^(3a), CONR^(3b)R^(3a), CONH₂, NR^(3a)COR^(3b), SO₂R^(3a), SOR^(3a), NHR^(3a), N(R^(3a))₂, (CH₂)_(q)—SR^(3a), (CH₂)_(q)—N(R^(3a))₂ and/or (CH₂)_(q)—Z; or 1- or 2-naphthyl, 2- or 3-thienyl, 3-benzofuryl or 2,3-dihydrobenzofuran-3-yl, each independently from one another unsubstituted or mono-, di- or trisubstituted by Hal, CN, R^(3a), OR^(3a), CONHR^(3a), CONR^(3b)R^(3a), CONH₂, NR^(3a)COR^(3b), SO₂R^(3a), SOR^(3a), NHR^(3a), N(R^(3a))₂, (CH₂)_(q)—SR^(3a), (CH₂)_(q)—N(R^(3a))₂ and/or (CH₂)_(q)—Z; and wherein q denotes 1 or 2, and R^(3a), R^(3b) and R^(3c) denote each, independently from one another, linear or branched C1-C3-alkyl, wherein 1 to 5 H atoms may be replaced by F, Cl, OH and OAlk, wherein Alk is methyl or ethyl; and derivatives, prodrugs, solvates, tautomers or stereoisomers thereof, as well as the physiologically acceptable salts of each of the foregoing, including mixtures thereof in all ratios; with the provisio that compound (R)-(2-(benzofuran-3-yl)-1-(2-(N-methylmethylsulfonamido) acetamido)ethyl)boronic acid is excluded.
 28. The compound according to claim 27, wherein Cyc denotes: 2,4-, 3,4-, or 2,3,4-substituted phenyl or unsubstituted or mono- or disubstituted 1- or 2-naphthyl, wherein the substituents are each, independently from one another, selected from the group consisting of Hal, CN, R^(3a), OR^(3a), CONHR^(3a), CONR^(3b)R^(3a), CONH₂, NR^(3a)COR^(3b), SO₂R^(3a), SOR^(3a), NHR^(3a), N(R^(3a))₂, (CH₂)_(q)—SR^(3a), (CH₂)_(q)—N(R^(3a))₂ and/or (CH₂)_(q)—Z; or Cyc is a residue according to formula (Fa7) or (Fb7)

wherein: G^(a) denotes, F, Cl, Br, CN, R^(3a), OR^(3a), CONHR^(3a), CONR^(3b)R^(3a), CONH₂, NR^(3a)COR^(3b), SO₂R^(3a), SOR^(3a), NHR^(3a), N(R^(3a))₂, (CH₂)_(q)—SR^(3a), (CH₂)_(q)—N(R^(3a))₂ and/or (CH₂)_(q)—Z; G^(b) denotes H, F, Cl, Br, CN, R^(3a), OR^(3a), CONHR^(3a), CONR^(3b)R^(3a), CONH₂, NR^(3a)COR^(3b), SO₂R^(3a), SOR^(3a), NHR^(3a), N(R^(3a))₂, (CH₂)_(q)—SR^(3a), (CH₂)_(q)—N(R^(3a))₂ and/or (CH₂)_(q)—Z; K^(a), K^(b) denote each, independently from one another, H, F, Cl, Br, CN, R^(3a), OR^(3a), CONHR^(3a), CONR^(3b)R^(3a), CONH₂, NR^(3a)COR^(3b), SO₂R^(3a), SOR^(3a), NHR^(3a), N(R^(3a))₂(CH₂)_(q)—SR^(3a), (CH₂)_(q)—N(R^(3a))₂ and/or (CH₂)_(q)—Z; R^(3a), R^(3b) and R^(3c) denote each, independently from one another, linear or branched C1-C3-alkyl, wherein 1 to 5 H atoms may be replaced by F, Cl, OH and OAlk, wherein Alk is methyl or ethyl; q denotes 1 or 2; and derivatives, prodrugs, solvates, tautomers or stereoisomers thereof, as well as the physiologically acceptable salts of each of the foregoing, including mixtures thereof in all ratios.
 29. The compound according to claim 28, wherein Cyc denotes: 2,4-, 3,4-, or 2,3,4-substituted phenyl or unsubstituted or mono- or disubstituted 1- or 2-naphthyl, wherein the substituents are each, independently from one another, selected from the group consisting of Hal, CN, R^(3a), OR^(3a), CONHR^(3a), CONR^(3b)R^(3a), CONH₂, NR^(3a)COR^(3b), SO₂R^(3a), SOR^(3a), NHR^(3a), N(R^(3a))₂, (CH₂)_(q)—SR^(3a), (CH₂)_(q)—N(R^(3a))₂ and/or (CH₂)_(q)—Z; or Cyc is a residue according to formula (Fa7) or (S)-(Fb7)

wherein: G^(a) denotes F, Cl, Br, CN, R^(3a), OR^(3a), CONHR^(3a), CONR^(3b)R^(3a), CONH₂, NR^(3a)COR^(3b), SO₂R^(3a), SOR^(3a), NHR^(3a), N(R^(3a))₂, (CH₂)_(q)—SR^(3a), (CH₂)_(q)—N(R^(3a))₂ and/or (CH₂)_(q)—Z; G^(b) denotes H, F, Cl, Br, CN, R^(3a), OR^(3a), CONHR^(3a), CONR^(3b)R^(3a), CONH₂, NR^(3a)COR^(3b), SO₂R^(3a), SOR^(3a), NHR^(3a), N(R^(3a))₂, (CH₂)_(q)—SR^(3a), (CH₂)_(q)—N(R^(3a))₂ and/or (CH₂)_(q)—Z; K^(a), K^(b) denote each, independently from one another, H, F, Cl, Br, CN, R^(3a), OR^(3a), CONHR^(3a), CONR^(3b)R^(3a), CONH₂, NR^(3a)COR^(3b), SO₂R^(3a), SOR^(3a), NHR^(3a), N(R^(3a))₂, (CH₂)_(q)—SR^(3a), (CH₂)_(q)—N(R^(3a))₂ and/or (CH₂)_(q)—Z; R^(3a), R^(3b) and R^(3c) denote each, independently from one another, linear or branched C1-C3-alkyl, wherein 1 to 5 H atoms may be replaced by F, Cl, OH and OAlk, wherein Alk is methyl or ethyl; q denotes 1 or 2; and derivatives, prodrugs, solvates, tautomers or stereoisomers thereof, as well as the physiologically acceptable salts of each of the foregoing, including mixtures thereof in all ratios.
 30. The compound according to claim 28, wherein Cyc denotes: 2,4-, 3,4-, or 2,3,4-substituted phenyl or unsubstituted or mono- or disubstituted 1- or 2-naphthyl, wherein the substituents are each, independently from one another, selected from the group consisting of F, Cl, CH₃, C₂H₅, CF₃, OCH₃, OC₂H₅, COCF₃, SCH₃, SC₂H₅, CH₂OCH₃, N(CH₃)₂, CH₂N(CH₃)₂ or N(C₂H₅)₂; or Cyc is a residue according to formula (Fa7), (Fb7) or (S)-(Fb7), wherein: G^(a) denotes F, Cl, CH₃, C₂H₅, CF₃, OCH₃, OC₂H₅, COCF₃, SCH₃, SC₂H₅, CH₂OCH₃, N(CH₃)₂, CH₂N(CH₃)₂ ^(or) N(C₂H₅)₂; G^(b) denotes H, F, Cl, CH₃, C₂H₅, CF₃, OCH₃, OC₂H₅, COCF₃, SCH₃, SC₂H₅, CH₂OCH₃, N(CH₃)₂, CH₂N(CH₃)₂ or N(C₂H₅)₂; K^(a), K^(b) denote each, independently from one another, H, F, Cl, CH₃, C₂H₅, CF₃, OCH₃, OC₂H₅, COCF₃, SCH₃, SC₂H₅, CH₂OCH₃, N(CH₃)₂, CH₂N(CH₃)₂ or N(C₂H₅)₂; and derivatives, prodrugs, solvates, tautomers or stereoisomers thereof, as well as the physiologically acceptable salts of each of the foregoing, including mixtures thereof in all ratios.
 31. The compound according to claim 22, wherein the stereogenic center at the carbon atom adjacent to the boronic acid residue shows an (R)-configuration; and wherein: LX denotes —CH₂—, —CH₂—CH₂—, —CH₂—CH₂—CH₂—, —CH₂—CH₂—CH₂—CH₂—, —CH₂—CH₂—O—CH₂— wherein 1 to 4 H atoms may be replaced by F or Cl and/or 1 or 2 H atoms may be replaced by OH, methy, ethyl, isopropyl, CF₃, CF₂CF₃, OCH₃, OCH₂CH₃, O—CH₂—CH₂—OH, O—CH₂—CH₂—OCH₃, phenyl, tolyl, ethylphenyl, fluorophenyl, chlorophenyl, bromophenyl, aminophenyl, furyl, thienyl, pyrrolyl, imidazolyl, pyrazolyl, pyrimidyl, morpholinyl and/or piperidinyl; and LY denotes —CH₂— or —CH₂—CH₂— wherein 1 to 4 H atom may be replaced by F or Cl and/or 1 or 2 H atoms may be replaced by OH, methy, ethyl, isopropyl, CF₃, CF₂CF₃, OCH₃, OCH₂CH₃, O—CH₂—CH₂—OH and/or O—CH₂—CH₂—OCH₃; and Y denotes Cyc; and R¹, R² denote each, independently from one another H or C1-C4-alkyl, or R¹ and R² form together a residue according to formula (CE) as described above; and R^(3a), R^(3b) and R^(3c) denote each, independently from one another, linear or branched C1-C3-alkyl, wherein 1 to 5 H atoms may be replaced by F, Cl, OH and OAlk, wherein Alk is methyl or ethyl; and A denotes ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl or tert-butyl, furthermore also pentyl, 1-, 2- or 3-methylbutyl, 1,1-, 1,2- or 2,2-dimethylpropyl, 1-ethylpropyl, hexyl, 1-, 2-, 3- or 4-methylpentyl, 1,1-, 1,2-, 1,3-, 2,2-, 2,3- or 3,3-dimethylbutyl, 1- or 2-ethylbutyl, 1-ethyl-1-methylpropyl or 1-ethyl-2-methylpropyl, each unsubstituted or mono-, di-, tri- or tetrasubstituted by Hal, CN, R^(3a), SR^(3a) ,OR^(3a), Ar1, Het1, and/or (CH₂)_(q)—Z; and Ar1 denotes phenyl, o-, m- or p-tolyl, o-, m- or p-ethylphenyl, o-, m- or p-propylphenyl, o-, m- or p-isopropylphenyl, o-, m- or p-tert-butylphenyl, o-, m- or p-hydroxyphenyl, o-, m- or p-nitrophenyl, o-, m- or p-aminophenyl, o-, m- or p-(N-methylamino)phenyl, o-, m- or p-(N-methylaminocarbonyl)phenyl, o-, m- or p-acetamidophenyl, o-, m- or p-methoxyphenyl, o-, m- or p-ethoxyphenyl, o-, m- or p-(N,N-dimethylamino)phenyl, o-, m- or p-(N-ethyl-amino)phenyl, o-, m- or p-(N,N-diethylamino)phenyl, o-, m- or p-fluorophenyl, o-, m- or p-bromophenyl, o-, m- or p-chlorophenyl, o-, m- or p-(methylsulfonyl)phenyl, o-, m- or p-methylsulfanylphenyl, o-, m- or p-cyanophenyl, o-, m- or p-(3-oxomorpholin-4-yl)phenyl, o-, m- or p-(piperidinyl)phenyl, o-, m- or p-(morpholin-4-yl)phenyl, furthermore preferably 2,3-, 2,4-, 2,5-, 2,6-, 3,4- or 3,5-dimethylphenyl, 2,3-, 2,4-, 2,5-, 2,6-, 3,4- or 3,5-difluorophenyl, 2,3-, 2,4-, 2,5-, 2,6-, 3,4- or 3,5-dichlorophenyl, 2,3-, 2,4-, 2,5-, 2,6-, 3,4- or 3,5-dibromophenyl, 2,4- or 2,5-dinitrophenyl, 2,5- or 3,4-dimethoxyphenyl, 3-nitro-4-chlorophenyl, 3-amino-4-chloro-, 2-amino-3-chloro-, 2-amino-4-chloro-, 2-amino-5-chloro- or 2-amino-6-chlorophenyl, 2-nitro-4-N,N-dimethylamino- or 3-nitro-4-N,N-dimethylaminophenyl, 2,3-diaminophenyl, 2,3,4-, 2,3,5-, 2,3,6-, 2,4,6- or 3,4,5-trichlorophenyl, 2,4,6-trimethoxyphenyl, 2-hydroxy-3,5-dichlorophenyl, p-iodophenyl, 3,6-di chloro-4-aminophenyl, 4-fluoro-3-chlorophenyl, 2-fluoro-4-bromophenyl, 2,5-difluoro-4-bromophenyl, 3-bromo-6-methoxyphenyl, 3-chloro-6-methoxyphenyl, 3-chloro-4-acetamidophenyl, 3-fluoro-4-methoxyphenyl, 3-amino-6-methylphenyl, 3-chloro-4-acetamidophenyl or 2,5-dimethyl-4-chlorophenyl; and Het1 denotes 2- or 3-furyl, 2- or 3-thienyl, 1-, 2- or 3-pyrrolyl, 1-, 2-, 4- or 5-imidazolyl, 1-, 3-, 4- or 5-pyrazolyl, 2-, 4- or 5-oxazolyl, 3-, 4- or 5-isoxazolyl, 2-, 4- or 5-thiazolyl, 3-, 4- or 5-isothiazolyl, 2-, 3- or 4-pyridyl, 2-, 4-, 5- or 6-pyrimidinyl, furthermore preferably 1,2,3-triazol-1-, -4- or -5-yl, 1,2,4-triazol-1-, -3- or -5-yl, 1- or 5-tetrazolyl, 1,2,3-oxadiazol-4- or -5-yl, 1,2,4-oxadiazol-3- or -5-yl, 1,3,4-thiadiazol-2- or -5-yl, 1,2,4-thiadiazol-3- or -5-yl, 1,2,3-thiadiazol-4- or -5-yl, 3- or 4-pyridazinyl or pyrazinyl, 2,3-dihydro-2-, -3-, -4- or -5-furyl, 2,5-dihydro-2-, -3-, -4- or -5-furyl, tetrahydro-2- or -3-furyl, 1,3-dioxolan-4-yl, tetrahydro-2- or -3-thienyl, 2,3-dihydro-1-, -2-, -3-, -4- or -5-pyrrolyl, 2,5-dihydro-1-, -2-, -3-, -4- or -5-pyrrolyl, 1-, 2- or 3-pyrrolidinyl, tetrahydro-1-, -2- or -4-imidazolyl, 2,3-dihydro-1-, -2-, -3-, -4- or -5-pyrazolyl, tetrahydro-1-, -3- or -4-pyrazolyl, 1,4-dihydro-1-, -2-, -3- or -4-pyridyl, 1,2,3,4-tetrahydro-1-, -2-, -3-, -4-, -5- or -6-pyridyl, 1-, 2-, 3- or 4-piperidinyl, 2-, 3- or 4-morpholinyl, tetrahydro-2-, -3- or -4-pyranyl, 1,4-dioxaneyl, 1,3-dioxane-2-, -4- or -5-yl, hexahydro-1-, -3- or -4-pyridazinyl, hexahydro-1-, -2-, -4- or -5-pyrimidinyl or 1-, 2- or 3-piperazinyl, each unsubstituted or mono- or disubstituted by F, Cl, CH₃, C₂H₅, CF₃, OCH₃, OC₂H₅, COCF₃, SCH₃, SC₂H₅, N(CH₃)₂, NHCH₃, CH₂N(CH₃)₂ and/or N(C₂H₅)₂; and Cyc phenyl, which is unsubstituted, mono-, di- or trisubstituted by Hal, CN, R^(3a), OR^(3a), CONHR^(3a), CONR^(3b)R^(3a), CONH₂, NR^(3a)COR^(3b), SO₂R^(3a), SOR^(3a), NHR^(3a), N(R^(3a))₂, CH₂—Z, CH₂—SR^(3a), CH₂—N(R^(3a))₂, Ar3 and/or Het3; or 1- or 2-naphthyl, 4- or 5- indanyl, 1-, 2-, 4-, 5- or 6- azulenyl, 1- or 2-tetrahydronaphthalin 5- or 6-yl, 2- or 3-furyl, 2-, 3-, 4-, 5-, 6- or 7-benzofuryl, 2,3-dihydrobenzofuran-2- or 3-yl, 2-, 3-, 4-, 5-, 6- or 7-benzothiophenyl, benzodioxan-6- or 7-yl or 3,4-dihydro-1,5-benzodioxepin-6- or -7-yl, each, independently form one another, unsubstituted or mono-, di- or trisubstituted by Hal, CN, R^(3a), OR^(3a), CONHR^(3a), CONR^(3b)R^(3a), CONH₂, NR^(3a)COR^(3b), SO₂R^(3a), SOR^(3a), NHR^(3a), N(R^(3a))₂, CH₂—Z, CH₂—SR^(3a), CH₂—N(R^(3a))₂, Ar3 and/or Het3; and Ar3 denotes phenyl unsubstituted or mono- or disubstituted by F, Cl, CH₃, C₂H₅, CF₃, OCH₃, OC₂H₅, COCF₃, SCH₃, SC₂H₅, N(CH₃)₂, NHCH₃, CH₂N(CH₃)₂ and/or N(C₂H₅)₂; Het3 denotes 2- or 3-furyl, 2- or 3-thienyl, 1-, 2- or 3-pyrrolyl, 1-, 2-, 4- or 5-imidazolyl, 1-, 3-, 4- or 5-pyrazolyl, 2-, 4- or 5-oxazolyl, 3-, 4- or 5-isoxazolyl, 2-, 4- or 5-thiazolyl, 3-, 4- or 5-isothiazolyl, 2-, 3- or 4-pyridyl, 2-, 4-, 5- or 6-pyrimidinyl, furthermore preferably 1,2,3-triazol-1-, -4- or -5-yl, 1,2,4-triazol-1-, -3- or -5-yl, 1- or 5-tetrazolyl, 1,2,3-oxadiazol-4- or -5-yl, 1,2,4-oxadiazol-3- or -5-yl, 1,3,4-thiadiazol-2- or -5-yl, 1,2,4-thiadiazol-3- or -5-yl, 1,2,3-thiadiazol-4- or -5-yl, 3- or 4-pyridazinyl or pyrazinyl, 2,3-dihydro-2-, -3-, -4- or -5-furyl, 2,5-dihydro-2-, -3-, -4- or -5-furyl, tetrahydro-2- or -3-furyl, 1,3-dioxolan-4-yl, tetrahydro-2- or -3-thienyl, 2,3-dihydro-1-, -2-, -3-, -4- or -5-pyrrolyl, 2,5-dihydro-1-, -2-, -3-, -4- or -5-pyrrolyl, 1-, 2- or 3-pyrrolidinyl, tetrahydro-1-, -2- or -4-imidazolyl, 2,3-dihydro-1-, -2-, -3-, -4- or -5-pyrazolyl, tetrahydro-1-, -3- or -4-pyrazolyl, 1,4-dihydro-1-, -2-, -3- or -4-pyridyl, 1,2,3,4-tetrahydro-1-, -2-, -3-, -4-, -5- or -6-pyridyl, 1-, 2-, 3- or 4-piperidinyl, 2-, 3- or 4-morpholinyl, tetrahydro-2-, -3- or -4-pyranyl, 1,4-dioxaneyl, 1,3-dioxane-2-, -4- or -5-yl, hexahydro-1-, -3- or -4-pyridazinyl, hexahydro-1-, -2-, -4- or -5-pyrimidinyl, 1-, 2- or 3-piperaziny; Z denotes OH, OCH₃, OCH₂CH₃, OCF₃, O—CH₂—CH₂—OH or O—CH₂—CH₂—OCH₃; and q denotes 1, 2, 3 or 4; and derivatives, prodrugs, solvates, tautomers or stereoisomers thereof, as well as the physiologically acceptable salts of each of the foregoing, including mixtures thereof in all ratios; with the provisio that compound (R)-(2-(benzofuran-3-yl)-1-(2-(N-methylmethylsulfonamido) acetamido)ethyl)boronic acid is excluded.
 32. The compound according to claim 22, wherein the stereogenic center at the carbon atom adjacent to the boronic acid residue shows an (R)-configuration; and wherein: LX denotes —CH₂—, —CH₂—CH₂—, —CH₂—CH₂—CH₂—, —CH₂—CH₂—CH₂—CH₂—, —CH₂—CH₂—O—CH₂— wherein 1 to 4 H atoms may he replaced by F or Cl and/or 1 or 2 H atoms may be replaced by OH, methy, ethyl, isopropyl, CF₃, CF₂CF₃, OCH₃, OCH₂CH₃, O—CH₂—CH₂—OH, O—CH₂—CH₂—OCH₃, phenyl, tolyl, ethylphenyl, fluorophenyl, chlorophenyl, bromophenyl, aminophenyl, furyl, thienyl, pyrrolyl, imidazolyl, pyrazolyl, pyrimidyl, morpholinyl and/or piperidinyl; and LY denotes —CH₂— or —CH₂—CH₂— wherein 1 to 4 H atom may be replaced by F or Cl and/or 1 or 2 H atoms may be replaced by OH, methy, ethyl, isopropyl, CF₃, CF₂CF₃, OCH₃, OCH₂CH₃, O—CH₂—CH₂—OH and/or O—CH₂—CH₂—OCH₃; and Y denotes Cyc; and R¹, R² denote each, independently from one another H or C1-C4-alkyl ,or R¹ and R² form together a residue according to formula (CE) as described above; and R^(3a), R^(3b) and R^(3c) denote each, independently from one another, linear or branched C1-C3-alkyl, wherein 1 to 5 H atoms may be replaced by F, Cl, OH and OAlk, wherein Alk is methyl or ethyl; and A denotes ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl or tert-butyl, furthermore also pentyl, 1-, 2- or 3-methylbutyl, 1,1-, 1,2- or 2,2-dimethylpropyl, 1-ethylpropyl, hexyl, 1-, 2-, 3- or 4-methylpentyl, 1,1-, 1,2-, 1,3-, 2,2-, 2,3- or 3,3-dimethylbutyl, 1- or 2-ethylbutyl, 1-ethyl-1-methylpropyl or 1-ethyl-2-methylpropyl, each unsubstituted or mono-, di-, tri- or tetrasubstituted by Hal, CN, R^(3a), SR^(3a), OR^(3a), Ar1, Het1, and/or (CH₂)_(q)—Z; and Ar1 denotes phenyl, o-, m- or p-tolyl, o-, m- or p-ethylphenyl, o-, m- or p-propylphenyl, o-, m- or p-isopropylphenyl, o-, m- or p-tert-butylphenyl, o-, m- or p-hydroxyphenyl, o-, m- or p-nitrophenyl, o-, m- or p-aminophenyl, o-, m- or p-(N-methylamino)phenyl, o-, m- or p-(N-methylaminocarbonyl)phenyl, o-, m- or p-acetamidophenyl, o-, m- or p-methoxyphenyl, o-, m- or p-ethoxyphenyl, o-, m- or p-(N,N-dimethylamino)phenyl, o-, m- or p-(N-ethylamino)phenyl, o-, m- or p-(N,N-diethylamino)phenyl, o-, m- or p-fluorophenyl, o-, m- or p-bromophenyl, o-, m- or p-chlorophenyl, o-, m- or p-(methylsulfonyl)phenyl, o-, m- or p-methylsulfanylphenyl, o-, m- or p-cyanophenyl, o-, m- or p-(3-oxomorpholin-4-yl)phenyl, o-, m- or p-(piperidinyl)phenyl, o-, m- or p-(morpholin-4-yl)phenyl, furthermore preferably 2,3-, 2,4-, 2,5-, 2,6-, 3,4- or 3,5-dimethylphenyl, 2,3-, 2,4-, 2,5-, 2,6-, 3,4- or 3,5-difluorophenyl, 2,3-, 2,4-, 2,5-, 2,6-, 3,4- or 3,5-dichlorophenyl, 2,3-, 2,4-, 2,5-, 2,6-, 3,4- or 3,5-dibromophenyl, 2,4- or 2,5-dinitrophenyl, 2,5- or 3,4-dimethoxyphenyl, 3-nitro-4-chlorophenyl, 3-amino-4-chloro-, 2-amino-3-chloro-, 2-amino-4-chloro-, 2-amino-5-chloro- or 2-amino-6-chlorophenyl, 2-nitro-4-N,N-dimethylamino- or 3-nitro-4-N,N-dimethylaminophenyl, 2,3-diaminophenyl, 2,3,4-, 2,3,5-, 2,3,6-, 2,4,6- or 3,4,5-trichlorophenyl, 2,4,6-trimethoxyphenyl, 2-hydroxy-3,5-dichlorophenyl, p-iodophenyl, 3,6-dichloro-4-aminophenyl, 4-fluoro-3-chlorophenyl, 2-fluoro-4-bromophenyl, 2,5-difluoro-4-bromophenyl, 3-bromo-6-methoxyphenyl, 3-chloro-6-methoxyphenyl, 3-chloro-4-acetamidophenyl, 3-fluoro-4-methoxyphenyl, 3-amino-6-methylphenyl, 3-chloro-4-acetamidophenyl or 2,5-dimethyl-4-chlorophenyl; and Het1 denotes 2- or 3-furyl, 2- or 3-thienyl, 1-, 2- or 3-pyrrolyl, 1-, 2-, 4- or 5-imidazolyl, 1-, 3-, 4- or 5-pyrazolyl, 2-, 4- or 5-oxazolyl, 3-, 4- or 5-isoxazolyl, 2-, 4- or 5-thiazolyl, 3-, 4- or 5-isothiazolyl, 2-, 3- or 4-pyridyl, 2-, 4-, 5- or 6-pyrimidinyl, furthermore preferably 1,2,3-triazol-1-, -4- or -5-yl, 1,2,4-triazol-1-, -3- or -5-yl, 1- or 5-tetrazolyl, 1,2,3-oxadiazol-4- or -5-yl, 1,2,4-oxadiazol-3- or -5-yl, 1,3,4-thiadiazol-2- or -5-yl, 1,2,4-thiadiazol-3- or -5-yl, 1,2,3-thiadiazol-4- or -5-yl, 3- or 4-pyridazinyl or pyrazinyl, 2,3-dihydro-2-, -3-, -4- or -5-furyl, 2,5-dihydro-2-, -3-, -4- or -5-furyl, tetrahydro-2- or -3-furyl, 1,3-dioxolan-4-yl, tetrahydro-2- or -3-thienyl, 2,3-dihydro-1-2-, -3-, -4- or -5-pyrrolyl, 2,5-dihydro-1-, -2-, -3-, -4- or -5-pyrrolyl, 1-, 2- or 3-pyrrolidinyl, tetrahydro-1-, -2- or -4-imidazolyl, 2,3-dihydro-1-, -2-, -3-, -4- or -5-pyrazolyl, tetrahydro-1-, -3- or -4-pyrazolyl, 1,4-dihydro-1-, -2-, -3- or -4-pyridyl, 1,2,3,4-tetrahydro-1-, -2-, -3-, -4-, -5- or -6-pyridyl, 1-, 2-, 3- or 4-piperidinyl, 2-, 3- or 4-morpholinyl, tetrahydro-2-, -3- or -4-pyranyl, 1,4-dioxaneyl, 1,3-dioxane-2-, -4- or -5-yl, hexahydro-1-, -3- or -4-pyridazinyl, hexahydro-1-, -2-, -4- or -5-pyrimidinyl, 1-, 2- or 3-piperazinyl; and Cyc denotes 2,4-, 3,4-, or 2,3,4-substituted phenyl or unsubstituted or mono- or disubstituted 1- or 2-naphthyl, wherein the substituents are each, independently from one another, selected from the group consisting of Hal, CN, R^(3a), OR^(3a), CONHR^(3a), CONR^(3b)R^(3a), CONH₂, NR^(3a)COR^(3b), SO₂R^(3a), SOR^(3a), NHR^(3a), N(R^(3a))₂, CH₂—Z, CH₂—SR^(3a), and CH₂—N(R^(3a))₂, or a residue according to formula (Fa7) or (S)-(Fb7)

G^(a) denotes F, Cl, CH₃, C₂H₅, CF₃, OCH₃, OC₂H₅, COCF₃, SCH₃, SC₂H₅, CH₂OCH₃, N(CH₃)₂, CH₂N(CH₃)₂ or N(C₂H₅)₂; G^(b) denotes H, F, Cl, CH₃, C₂H₅, CF₃, OCH₃, OC₂H₅, COCF₃, SCH₃, SC₂H₅, CH₂OCH₃, N(CH₃)₂, CH₂N(CH₃)₂ or N(C₂H₅)₂; K^(a), K^(b) denote each, independently from one another, H, F, Cl, CH₃, C₂H₅, CF₃, OCH₃, OC₂H₅, COCF₃, SCH₃, SC₂H₅, CH₂OCH₃, N(CH₃)₂, CH₂N(CH₃)₂ or N(C₂H₅)₂; Z denotes OH, OCH₃, OCH₂CH₃, OCF₃, O—CH₂—CH₂—OH or O—CH₂—CH₂—OCH₃; q denotes 1, 2, 3 or 4; and derivatives, prodrugs, solvates, tautomers or stereoisomers thereof, as well as the physiologically acceptable salts of each of the foregoing, including mixtures thereof in all ratios; with the provisio that compound (R)-(2-(benzofuran-3-yl)-1-(2-(N-methylmethylsulfonamido) acetamido)ethyl)boronic acid is excluded.
 33. The compound according to claim 22, said compound being selected from the group consisting of: [(1R)-1-[3-(N-acetylanilino)propanoylamino]-2-phenyl-ethyl]boronic acid; [(1R)-1-[3-(N-ethylsulfonylanilino)propanoylamino]-2-(p-tolyl)ethyl]boronic acid; [(1R)-1-[3-(N-methylsulfonylanilino)propanoyl amino]-2-(p-tolyl)ethyl]boronic acid; [(1R)-1-[3-(benzenesulfonyl)propanoylamino]-2-(benzofuran-3-yl)ethyl]boronic acid; [(1R)-1-[3-[benzenesulfonyl(ethyl)amino]propanoylamino]-2-(p-tolyl)ethyl]boronic acid; [(1R)-1-[3-[benzenesulfonyl(isopropyl)amino]propanoylamino]-2-(p-tolyl)ethyl]-boronic acid; [(1R)-1-[3-[benzenesulfonyl(methyeamino]propanoylamino]-2-(p-tolyeethyl]-boronic acid; [(1R)-1-[3-[benzoyl(ethyl)amino]propanoylamino]-2-phenyl-ethyl]boronic acid; [(1R)-1-[3-[benzoyl(isopropyl)amino]propanoylamino]-2-phenyl-ethyl]boronic acid; [(1R)-1-[3-[benzoyl(methyl)amino]propanoylamino]-2-phenyl-ethyl]boronic acid; [(1R)-1-[3-[ethyl(ethylsulfonyl)amino]propanoylamino]-2-(p-tolyl)ethyl]boronic acid; [(1R)-1-[3-[ethyl-(2-methylbenzoyl)amino]propanoylamino]-2-phenyl-ethyl]boronic acid; [(1R)-1-[3-[ethyl-(3-methylbenzoyeamino]propanoylamino]-2-phenyl -ethyl]boronic acid; [(1R)-1-[3-[ethyl-(4-methylbenzoyl)amino]propanoylamino]-2-phenyl-ethyl]boronic acid; [(1R)-1-[3-[isopropyl(methylsulfonyl)amino]propanoylamino]-2-(p-tolyl)ethyl]-boronic acid; [(1R)-1-[[2-[benzenesulfonyl(ethyl)amino]acetyl]amino]-2-(p-tolyl)ethyl]boronic acid; [(1R)-1-[[2-[benzoyl(ethyl)amino]acetyl]amino]-2-phenyl-ethyl]boronic acid; [(1R)-1-[[5-(dimethylamino)-5-oxo-pentanoyl]amino]-2-(3-ethylphenyl)ethyl]-boronic acid; [(1R)-2-(2,4-dimethylphenyl)-1-[3-[ethyl-(4-methylbenzoyl)amino]-propanoylamino]ethyl]boronic acid; [(1R)-2-(3-ethylphenyl)-1-(3-methylsulfonylpropanoylamino)ethyl]boronic acid; [(1R)-2-(3-ethylphenyl)-1-(4-methylsulfonylbutanoylamino)ethyl]boronic acid; [(1R)-2-(3-ethylphenyl)-1-(5-methylsulfonylpentanoylamino)ethyl]boronic acid; [(1R)-2-(benzofuran-3-yl)-1-(3-methylsulfonylpropanoylamino)ethyl]boronic acid; [(1R)-2-(2,4-dimethylphenyl)-1-[[2-[ethyl(propanoyl)amino]acetyl]amino]ethyl]-boronic acid; [(1R)-1-[3-[ethyl-(4-methoxybenzoyl)amino]propanoylamino]-2-(4-fluorophenyl)-ethyl]boronic acid; [(1R)-1-[3-[(4-chlorobenzoyl)-ethyl-amino]propanoylamino]-2-(4-fluorophenyl)-ethyl]boronic acid; [(1R)-1-[3-[ethyl -[4-(trifluoromethyl)benzoyl]amino]propanoylamino]-2-(4-fluorophenyl)ethyl]boronic acid; [(1R)-1-[3-[(4-cyanobenzoyl)-ethyl-amino]propanoylamino]-2-(4-fluorophenyl)-ethyl]boronic acid; [(1R)-2-(2,4-dimethylphenyl)-1-[[2-[ethyl(o-tolylsulfonyl)amino]acetyl]amino]ethyl]-boronic acid; [(1R)-2-(2,4-dimethylphenyl)-1-[[2-[ethyl(p-tolylsulfonyeamino]acetyl]amino]ethyl]-boronic acid; [(1R)-2-(2,4-dimethylphenyl)-1-[[2-[ethyl(m-tolylsulfonyl)amino]acetyl]amino]ethyl]-boronic acid; [(1R)-2-(2,4-dimethylphenyl)-1-[[2-[methyl(p-tolylsulfonyl)amino]acetyl]amino]-ethyl]boronic acid; [(1R)-2-(2,4-dimethylphenyl)-1-[[2-[isopropyl(p-tolylsulfonyl)amino]acetyl]amino]-ethyl]boronic acid; [(1R)-2-(2,4-dimethylphenyl)-1-[[2-(N-propanoylanilino)acetyl]amino]-ethyl]boronic acid; [(1R)-1-[[2-[N-(benzenesulfonyl)anilino]acetyl]amino]-2-(2,4-dimethylphenyl)ethyl]-boronic acid; [(1R)-2-(2,4-dimethylphenyl)-1-[[2-[ethyl-(2-methylsulfanylacetyl)-amino]acetyl]-amino]ethyl]boronic acid; [(1R)-1-[[2-[(2-chloroacetyl)-ethyl-amino]acetyl]amino]-2-(2,4-dimethylphenyl)-ethyl]boronic acid; [(1R)-2-(benzofuran-3-yl)-1-[[3-(dimethylamino)-3-oxo-2-phenyl-propanoyl]-amino]ethyl]boronic acid; [(1R)-1-[[2-(2-fluoro-N-propanoyl-anilino)acetyl]amino]-2-(3-thienyl)ethyl]boronic acid; [(1R)-1-[[2-[methyl-[2-(trifluoromethyl)benzoyl]amino]acetyl]amino]-2-(3-thienyl)ethyl]boronic acid; [(1R)-2-[(3S)-2,3-dihydrobenzofuran-3-yl]-1-[[2-[isopropyl(p-tolylsulfonyl)amino]-acetyl]-amino]ethyl]boronic acid; [(1R)-1-[3[(4-chlorobenzoyl)-ethyl-amino]propanoylamino]-2-[(3 S)-2,3-dihydrobenzofuran-3-yl]ethyl]boronic acid; [(1R)-1-[[2-[ethyl(p-tolylsulfonyl)amino]acetyl]amino]-2-(7-methylbenzofuran-3-yl)ethyl]boronic acid; and derivatives, prodrugs, solvates, tautomers or stereoisomers thereof, as well as the physiologically acceptable salts of each of the foregoing, including mixtures thereof in all ratios.
 34. A process for the preparation of compounds of the formula I and pharmaceutically acceptable salts, tautomers and stereoisomers thereof, characterised in that a compound of Formula (III)

is coupled with a compound of Formula (VI)

wherein all residues of formula (III) and formula (IV) are as defined in claim 22 and wherein the obtained compound of Formula (Ib) is subsequently converted into a compound of Formula (Ia), by treatment with HCl, HBr, HI and/or TFA, in the presence or absence of an excess of a small molecular weight boronic acid


35. A pharmaceutical composition comprising at least one compound according to claim 22, or its derivatives, prodrugs, solvates, tautomers or stereoisomers thereof as well as the physiologically acceptable salts of each of the foregoing, including mixtures thereof in all ratios, as active ingredient, together with a pharmaceutically acceptable carrier.
 36. The pharmaceutical composition according to claim 35, said composition further comprises a second active ingredient or its derivatives, prodrugs, solvates, tautomers or stereoisomers thereof as well as the physiologically acceptable salts of each of the foregoing, including mixtures thereof in all ratios, wherein that second active ingredient is other than a compound of formula (I).
 37. A method of treating a subject for medical conditions affected by inhibiting LMP7 comprising administering a compound according to claim 22 or its derivatives, prodrugs, solvates, tautomers or stereoisomers thereof as well as the physiologically acceptable salts of each of the foregoing, including mixtures thereof in all ratios to said subject.
 38. The method according to claim 37, wherein said medical condition is an immunoregulatory abnormality or hematological malignancies.
 39. The method according to claim 38, wherein the immunoregulatory abnormality is an autoimmune or chronic inflammatory disease selected from the group consisting of systemic lupus erythematosis, chronic rheumatoid arthritis, inflammatory bowel disease, multiple sclerosis, amyotrophic lateral sclerosis (ALS), atherosclerosis, scleroderma, autoimmune hepatitis, Sjogren Syndrome, lupus nephritis, glomerulonephritis, Rheumatoid Arthritis, Psoriasis, Myasthenia Gravis, Imunoglobuline A nephropathy, Vasculitis, Transplant rejection, Myositis, Henoch-Schönlein purpura and asthma; and wherein the hematological malignancy is a disease selected from the group consisting of Multiple myeloma, chronic lymphoid leukemia, acute myeloid leukemia, and mantle cell lymphoma.
 40. A kit consisting of separate packs of: (a) an effective amount of a compound of the formula (I) and/or pharmaceutically acceptable salts, tautomers and stereoisomers thereof, including mixtures thereof in all ratios, and (b) an effective amount of a further medicament active ingredient. 